78506631057604 has 12 divisors (see below), whose sum is σ = 139638843766828. Its totient is φ = 38609818552800.

The previous prime is 78506631057601. The next prime is 78506631057611. The reversal of 78506631057604 is 40675013660587.

It can be written as a sum of positive squares in 2 ways, for example, as 36171828547204 + 42334802510400 = 6014302^2 + 6506520^2 .

It is a super-2 number, since 2×78506631057604² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78506631057601) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 160874243727 + ... + 160874244214.

Almost surely, 2^{78506631057604} is an apocalyptic number.

It is an amenable number.

78506631057604 is a deficient number, since it is larger than the sum of its proper divisors (61132212709224).

78506631057604 is a wasteful number, since it uses less digits than its factorization.

78506631057604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 321748488006 (or 321748488004 counting only the distinct ones).

The product of its (nonzero) digits is 25401600, while the sum is 58.

The spelling of 78506631057604 in words is "seventy-eight trillion, five hundred six billion, six hundred thirty-one million, fifty-seven thousand, six hundred four".