78637675564 has 24 divisors (see below), whose sum is σ = 157283060480. Its totient is φ = 33700208976.

The previous prime is 78637675553. The next prime is 78637675573. The reversal of 78637675564 is 46557673687.

It is a junction number, because it is equal to n+sod(n) for n = 78637675496 and 78637675505.

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, 641017 + ... + 753775.

Almost surely, 2^78637675564 is an apocalyptic number.

It is an amenable number.

78637675564 is an abundant number, since it is smaller than the sum of its proper divisors (78645384916).

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

78637675564 is a wasteful number, since it uses less digits than its factorization.

78637675564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137677 (or 137675 counting only the distinct ones).

The product of its digits is 177811200, while the sum is 64.

The spelling of 78637675564 in words is "seventy-eight billion, six hundred thirty-seven million, six hundred seventy-five thousand, five hundred sixty-four".