Create Free Account | Log In


A Quadragintacentillion (1 Quadragintacentillion) is 10 to the power of 423 (10^423). This is a grandiosely astronomical number!

How many zeros in a Quadragintacentillion?

There are 423 zeros in a Quadragintacentillion.

What's before Quadragintacentillion?

A Noventrigintacentillion is smaller than a Quadragintacentillion.

What's after Quadragintacentillion?

A Unquadragintacentillion is larger than a Quadragintacentillion.


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

Is Quadragintacentillion the largest number?

Quadragintacentillion 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.

Quadragintacentillion written out

Quadragintacentillion 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!