79686629930 has 16 divisors (see below), whose sum is σ = 143439486120. Its totient is φ = 31873862592.

The previous prime is 79686629887. The next prime is 79686629951. The reversal of 79686629930 is 3992668697.

It can be written as a sum of positive squares in 4 ways, for example, as 76584474121 + 3102155809 = 276739^2 + 55697^2 .

It is a super-3 number, since 3×79686629930³ (a number of 34 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 495932 + ... + 636648.

Almost surely, 2^79686629930 is an apocalyptic number.

79686629930 is a deficient number, since it is larger than the sum of its proper divisors (63752856190).

79686629930 is a wasteful number, since it uses less digits than its factorization.

79686629930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197353.

The product of its (nonzero) digits is 52907904, while the sum is 65.

The spelling of 79686629930 in words is "seventy-nine billion, six hundred eighty-six million, six hundred twenty-nine thousand, nine hundred thirty".