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A nonagintillion is equal to 10273 in the short scale, or 10540 in the long scale.[1]

In the long scale which is commonly used in France and Germany, 10273 is called quinquadragintilliard.

## Decimal

Written out in decimal form nonagintillion is:

• 1,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000 - short scale
• 1,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000 - long scale

## Approximations

For short scale:

Notation Lower bound Upper bound
Scientific notation $$1\times10^{273}$$
Arrow notation $$10\uparrow273$$
Steinhaus-Moser Notation 129[3] 130[3]
Copy notation 9[273] 10[137]
Taro's multivariable Ackermann function A(3,903) A(3,904)
Pound-Star Notation #*((11))*11 #*((12))*11
BEAF {10,273}
Hyper-E notation E273
Bashicu matrix system (0)(0)(0)(0)(0)(0)[18434] (0)(0)(0)(0)(0)(0)[18435]
Hyperfactorial array notation 154! 155!
Fast-growing hierarchy $$f_2(897)$$ $$f_2(898)$$
Hardy hierarchy $$H_{\omega^2}(897)$$ $$H_{\omega^2}(898)$$
Slow-growing hierarchy $$g_{\omega^{\omega^22+\omega7+3}}(10)$$

For long scale:

Notation Lower bound Upper bound
Scientific notation $$1\times10^{540}$$
Arrow notation $$10\uparrow540$$
Steinhaus-Moser Notation 228[3] 229[3]
Copy notation 9[540] 1[541]
Taro's multivariable Ackermann function A(3,1790) A(3,1791)
Pound-Star Notation #*((1269))*14 #*((1270))*14
BEAF {10,540}
Hyper-E notation E540
Bashicu matrix system (0)(1)[8] (0)(1)[9]
Hyperfactorial array notation 269! 270!
Fast-growing hierarchy $$f_2(1783)$$ $$f_2(1784)$$
Hardy hierarchy $$H_{\omega^2}(1783)$$ $$H_{\omega^2}(1784)$$
Slow-growing hierarchy $$g_{\omega^{\omega^25+\omega4}}(10)$$

## List of prefixed numbers derived from nonagintillion

Name Short scale Long scale
unnonagintillion 10276 10546
duononagintillion 10279 10552
trenonagintillion 10282 10558
quattuornonagintillion 10285 10564
quinnonagintillion 10288 10570
sexnonagintillion 10291 10576
septennonagintillion 10294 10582
octononagintillion 10297 10588
novemnonagintillion 10300 10594

## Sources

1. Nonagintillion at Notes on Big Numbers

Main article: -illion
1–9: million · billion · trillion · quadr · quint · sext · sept · oct · non
10–19: decillion · undec · duodec · tredec · quattuordec · quindec · sexdec · septendec · octodec · novemdec
20–29: vigintillion · unvigint · duovigint · trevigint · quattuorvigint · quinvigint · sexvigint · septenvigint · octovigint · novemvigint
30–39: trigintillion (un- · duo- · tre- · quattuor- · quin- · sex- · septen- · octo- · novem-)
40–49: quadragintillion (un- · duo- · tre- · quattuor- · quin- · sex- · septen- · octo- · novem-)
50–59: quinquagintillion (un- · duo- · tre- · quattuor- · quin- · sex- · septen- · octo- · novem-)
60–69: sexagintillion (un- · duo- · tre- · quattuor- · quin- · sex- · septen- · octo- · novem-)
70–79: septuagintillion (un- · duo- · tre- · quattuor- · quin- · sex- · septen- · octo- · novem-)
80–89: octogintillion (un- · duo- · tre- · quattuor- · quin- · sex- · septen- · octo- · novem-)
90–99: nonagintillion (un- · duo- · tre- · quattuor- · quin- · sex- · septen- · octo- · novem-)
100–900: centillion · unviginticent · ducent · trecent · duotrigintatrecent · quadringent · quingent · sescent · septuagintisescent · septingent · octingent · nongent
1,000–1024: millillion · dumill · trimill · quadrimill · quinmill · sexmill · septimill · octimill · nonimill · myr · centimill · micr · nan · pic · femt · att · zept · yoct