8197572807 has 24 divisors (see below), whose sum is σ = 12373171200. Its totient is φ = 5220072528.

The previous prime is 8197572707. The next prime is 8197572809. The reversal of 8197572807 is 7082757918.

It is a happy number.

It is not a de Polignac number, because 8197572807 - 2⁷ = 8197572679 is a prime.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8197572809) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 121294 + ... + 176372.

It is an arithmetic number, because the mean of its divisors is an integer number (515548800).

Almost surely, 2^8197572807 is an apocalyptic number.

8197572807 is a deficient number, since it is larger than the sum of its proper divisors (4175598393).

8197572807 is a wasteful number, since it uses less digits than its factorization.

8197572807 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55827 (or 55824 counting only the distinct ones).

The product of its (nonzero) digits is 1975680, while the sum is 54.

The square root of 8197572807 is about 90540.4484581339. The cubic root of 8197572807 is about 2016.3306918964.

The spelling of 8197572807 in words is "eight billion, one hundred ninety-seven million, five hundred seventy-two thousand, eight hundred seven".