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A quattuorquinquagintillion is equal to 10165 in America, or 10324 in France and Germany.[1]

In the long scale which is commonly used in France and Germany, 10165 is called septenvigintilliard.

Quattuorquinquagintillion is notable for being one of the longest common -illion names.

## Approximations Edit

For short scale:

Notation Lower bound Upper bound
Scientific notation $$1\times10^{165}$$
Arrow notation $$10\uparrow165$$
Steinhaus-Moser Notation 85[3] 86[3]
Copy notation 9[165] 10[83]
Taro's multivariable Ackermann function A(3,545) A(3,546)
Pound-Star Notation #*((7))*9 #*((8))*9
BEAF {10,165}
Hyper-E notation E165
Bashicu matrix system (0)(0)(0)(0)(0)(0)[378] (0)(0)(0)(0)(0)(0)[379]
Hyperfactorial array notation 103! 104!
Fast-growing hierarchy $$f_2(539)$$ $$f_2(540)$$
Hardy hierarchy $$H_{\omega^2}(539)$$ $$H_{\omega^2}(540)$$
Slow-growing hierarchy $$g_{\omega^{\omega^2+\omega6+5}}(10)$$

For long scale:

Notation Lower bound Upper bound
Scientific notation $$1\times10^{324}$$
Arrow notation $$10\uparrow324$$
Steinhaus-Moser Notation 149[3] 150[3]
Copy notation 9[324] 1[325]
Taro's multivariable Ackermann function A(3,1073) A(3,1074)
Pound-Star Notation #*((3149))*11 #*((3150))*11
BEAF {10,324}
Hyper-E notation E324
Bashicu matrix system (0)(0)(0)(0)(0)(0)(0)[339] (0)(0)(0)(0)(0)(0)(0)[340]
Hyperfactorial array notation 177! 178!
Fast-growing hierarchy $$f_2(1\,066)$$ $$f_2(1\,067)$$
Hardy hierarchy $$H_{\omega^2}(1\,066)$$ $$H_{\omega^2}(1\,067)$$
Slow-growing hierarchy $$g_{\omega^{\omega^23+\omega2+4}}(10)$$

## List of prefixed numbers derived from quinquagintillionEdit

Name Short scale Long scale
unquinquagintillion 10156 10306
duoquinquagintillion 10159 10312
trequinquagintillion 10162 10318
quattuorquinquagintillion 10165 10324
quinquinquagintillion 10168 10330
sexquinquagintillion 10171 10336
septenquinquagintillion 10174 10342
octoquinquagintillion 10177 10348
novemquinquagintillion 10180 10354

## Sources Edit

1. Very big numbers on Skynet