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An unoctogintillion is equal to 10246 in America, or 10486 in France and Germany.[1]

In the long scale which is commonly used in France and Germany, 10246 is called unquadragintillion.

SuperJedi224 calls this number (in short scale) ter-tritillion[2].

Approximations

For short scale:

Notation Lower bound Upper bound
Scientific notation $$1\times10^{246}$$
Arrow notation $$10\uparrow246$$
Steinhaus-Moser Notation 118[3] 119[3]
Copy notation 9[246] 1[247]
Taro's multivariable Ackermann function A(3,814) A(3,815)
Pound-Star Notation #*((387))*10 #*((388))*10
BEAF {10,246}
Hyper-E notation E246
Bashicu matrix system (0)(0)(0)(0)(0)(0)[6978] (0)(0)(0)(0)(0)(0)[6979]
Hyperfactorial array notation 142! 143!
Fast-growing hierarchy $$f_2(807)$$ $$f_2(808)$$
Hardy hierarchy $$H_{\omega^2}(807)$$ $$H_{\omega^2}(808)$$
Slow-growing hierarchy $$g_{\omega^{\omega^22+\omega4+6}}(10)$$

For long scale:

Notation Lower bound Upper bound
Scientific notation $$1\times10^{486}$$
Arrow notation $$10\uparrow486$$
Steinhaus-Moser Notation 209[3] 210[3]
Copy notation 9[486] 1[487]
Taro's multivariable Ackermann function A(3,1611) A(3,1612)
Pound-Star Notation #*((12))*14 #*((13))*14
BEAF {10,486}
Hyper-E notation E486
Bashicu matrix system (0)(0)(0)(0)(0)(0)(0)[6264] (0)(0)(0)(0)(0)(0)(0)[6265]
Hyperfactorial array notation 247! 248!
Fast-growing hierarchy $$f_2(1603)$$ $$f_2(1604)$$
Hardy hierarchy $$H_{\omega^2}(1603)$$ $$H_{\omega^2}(1604)$$
Slow-growing hierarchy $$g_{\omega^{\omega^24+\omega8+6}}(10)$$

List of prefixed numbers derived from octogintillion

Name Short scale Long scale
unoctogintillion 10246 10486
duooctogintillion 10249 10492
treoctogintillion 10252 10498
quattuoroctogintillion 10255 10504
quinoctogintillion 10258 10510
sexoctogintillion 10261 10516
septenoctogintillion 10264 10522
octooctogintillion 10267 10528
novemoctogintillion 10270 10534

Sources

Numbers By SuperJedi224

Fibonacci Numbers

Level One

Level Two

#*

#**

H#*

#*{}

#*<<>>

H#*<<>>

Bingol series

Based on the Faxul

Other factorials

Googovipleccix family

Graham Sequence Numbers

-Illion numbers

Level One

Level Three

Level Four

"-Illion" numbers by SuperJedi224

Level One

Level Three

Level Four