79637259978 has 24 divisors (see below), whose sum is σ = 174731544000. Its totient is φ = 26209730664.

The previous prime is 79637259967. The next prime is 79637260013. The reversal of 79637259978 is 87995273697.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28000428 + ... + 28003271.

It is an arithmetic number, because the mean of its divisors is an integer number (7280481000).

Almost surely, 2^79637259978 is an apocalyptic number.

79637259978 is an abundant number, since it is smaller than the sum of its proper divisors (95094284022).

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

79637259978 is a wasteful number, since it uses less digits than its factorization.

79637259978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56003786 (or 56003783 counting only the distinct ones).

The product of its digits is 360067680, while the sum is 72.

The spelling of 79637259978 in words is "seventy-nine billion, six hundred thirty-seven million, two hundred fifty-nine thousand, nine hundred seventy-eight".