79686600642 has 24 divisors (see below), whose sum is σ = 188350147440. Its totient is φ = 24147454680.

The previous prime is 79686600641. The next prime is 79686600677. The reversal of 79686600642 is 24600668697.

It is not an unprimeable number, because it can be changed into a prime (79686600641) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 201228592 + ... + 201228987.

It is an arithmetic number, because the mean of its divisors is an integer number (7847922810).

Almost surely, 2^79686600642 is an apocalyptic number.

79686600642 is an abundant number, since it is smaller than the sum of its proper divisors (108663546798).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

79686600642 is a wasteful number, since it uses less digits than its factorization.

79686600642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 402457598 (or 402457595 counting only the distinct ones).

The product of its (nonzero) digits is 5225472, while the sum is 54.

The spelling of 79686600642 in words is "seventy-nine billion, six hundred eighty-six million, six hundred thousand, six hundred forty-two".