79431804636 has 12 divisors (see below), whose sum is σ = 185340877512. Its totient is φ = 26477268208.

The previous prime is 79431804619. The next prime is 79431804667. The reversal of 79431804636 is 63640813497.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3309658515 + ... + 3309658538.

It is an arithmetic number, because the mean of its divisors is an integer number (15445073126).

Almost surely, 2^79431804636 is an apocalyptic number.

It is an amenable number.

79431804636 is an abundant number, since it is smaller than the sum of its proper divisors (105909072876).

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

79431804636 is a wasteful number, since it uses less digits than its factorization.

79431804636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6619317060 (or 6619317058 counting only the distinct ones).

The product of its (nonzero) digits is 2612736, while the sum is 51.

The spelling of 79431804636 in words is "seventy-nine billion, four hundred thirty-one million, eight hundred four thousand, six hundred thirty-six".