Create Free Account | Log In


A Quattuoroctogintillion (1 Quattuoroctogintillion) is 10 to the power of 255 (10^255). This is a grandiosely astronomical number!

How many zeros in a Quattuoroctogintillion?

There are 255 zeros in a Quattuoroctogintillion.

What's before Quattuoroctogintillion?

A Tresoctogintillion is smaller than a Quattuoroctogintillion.

What's after Quattuoroctogintillion?

A Quinoctogintillion is larger than a Quattuoroctogintillion.


A Quattuoroctogintillionaire is someone whos assets, net worth or wealth is 1 or more Quattuoroctogintillion. It is unlikely anyone will ever be a true Quattuoroctogintillionaire. If you want to be a Quattuoroctogintillionaire, play Tap Tales!

Is Quattuoroctogintillion the largest number?

Quattuoroctogintillion is not the largest number. Infinity best describes the largest possible number - if there even is one! We cannot comprehend what the largest number actually is.

Quattuoroctogintillion written out

Quattuoroctogintillion is written out as:


Big Numbers

This is just one of many really big numbers!

Play Now

Choose your device:

FREE to download and play!