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An octosexagintillion is equal to 10207 in America, or 10408 in France and Germany.[1]

In the long scale which is commonly used in France and Germany, 10207 is called quattuortrigintilliard.

## ApproximationsEdit

For short scale:

Notation Lower bound Upper bound
Scientific notation $$1\times10^{207}$$
Arrow notation $$10\uparrow207$$
Steinhaus-Moser Notation 102[3] 103[3]
Copy notation 9[207] 10[104]
Taro's multivariable Ackermann function A(3,684) A(3,685)
Pound-Star Notation #*((2180))*9 #*((2181))*9
BEAF {10,207}
Hyper-E notation E207
Bashicu matrix system (0)(0)(0)(0)(0)(0)[1715] (0)(0)(0)(0)(0)(0)[1716]
Hyperfactorial array notation 123! 124!
Fast-growing hierarchy $$f_2(678)$$ $$f_2(679)$$
Hardy hierarchy $$H_{\omega^2}(678)$$ $$H_{\omega^2}(679)$$
Slow-growing hierarchy $$g_{\omega^{\omega^22+7}}(10)$$

For long scale:

Notation Lower bound Upper bound
Scientific notation $$1\times10^{408}$$
Arrow notation $$10\uparrow408$$
Steinhaus-Moser Notation 180[3] 181[3]
Copy notation 9[408] 1[409]
Taro's multivariable Ackermann function A(3,1352) A(3,1353)
Pound-Star Notation #*((13))*13 #*((14))*13
BEAF {10,408}
Hyper-E notation E408
Bashicu matrix system (0)(0)(0)(0)(0)(0)(0)[1539] (0)(0)(0)(0)(0)(0)(0)[1540]
Hyperfactorial array notation 214! 215!
Fast-growing hierarchy $$f_2(1344)$$ $$f_2(1345)$$
Hardy hierarchy $$H_{\omega^2}(1344)$$ $$H_{\omega^2}(1345)$$
Slow-growing hierarchy $$g_{\omega^{\omega^24+8}}(10)$$

## List of prefixed numbers derived from sexagintillionEdit

Name Short scale Long scale
unsexagintillion 10186 10366
duosexagintillion 10189 10372
tresexagintillion 10192 10378
quattuorsexagintillion 10195 10384
quinsexagintillion 10198 10390
sexsexagintillion 10201 10396
septensexagintillion 10204 10402
octosexagintillion 10207 10408
novemsexagintillion 10210 10414

## Sources Edit

1. Very big numbers on Skynet