The exact factorial of 155 is:

4789142901463393876335775239063022722176295591337767174070096339929153381622433264146569329274347655956110484372311586936020749175429076661003216274382475477806479918110524333880196139452687559896255940215628508414806740389616633144934400000000000000000000000000000000000000

📌 Number of digits in the exact factorial of 155! = 274.

Approximately, the value of 155! can also be written as 4.789142901 E+273.

## How to calculate 155!

The formula for finding the factorial of a number is:

n! = n × (n-1) × (n-2) × … × 2 × 1

The same formula can also be written in terms of PI product notation as: So, by definition, 155! is calculated as:

155 × 154 × 153 × … × 2 × 1

Also see:

### How many digits are there in the exact value of 155!?

There are 274 digits in the exact value of 155!.

### What is the value of 155 factorial in terms of E?

The value of 155! in terms of E is 4.789142901 E+273.

### What are the uses of factorials?

According to Wikipedia:

In mathematical analysis, factorials are used in power series for the exponential function and other functions, and they also have applications in algebra, number theory, probability theory, and computer science.