The exact factorial of 85 is:

281710411438055027694947944226061159480056634330574206405101912752560026159795933451040286452340924018275123200000000000000000000

📌 Number of digits in the exact factorial of 85! = 129.

Approximately, the value of 85! can also be written as 2.817104114 E+128.

## How to calculate 85!

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, 85! is calculated as:

85 × 84 × 83 × … × 2 × 1

Also see:

### How many digits are there in the exact value of 85!?

There are 129 digits in the exact value of 85!.

### What is the value of 85 factorial in terms of E?

The value of 85! in terms of E is 2.817104114 E+128.

### 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.