Seseptuagintacentillion

A Seseptuagintacentillion (1 Seseptuagintacentillion) is 10 to the power of 531 (10^531). This is an excessively astronomical number!

How many zeros in a Seseptuagintacentillion?

There are 531 zeros in a Seseptuagintacentillion.

What's before Seseptuagintacentillion?

A Quinseptuagintacentillion is smaller than a Seseptuagintacentillion.

What's after Seseptuagintacentillion?

A Septenseptuagintacentillion is larger than a Seseptuagintacentillion.

Seseptuagintacentillionaire

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

Is Seseptuagintacentillion the largest number?

Seseptuagintacentillion 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.

Seseptuagintacentillion written out

Seseptuagintacentillion is written out as:

1,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000

Big Numbers

This is just one of many really big numbers!