78616664502 has 64 divisors (see below), whose sum is σ = 162373788864. Its totient is φ = 25359759360.

The previous prime is 78616664479. The next prime is 78616664513. The reversal of 78616664502 is 20546661687.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 28308538 + ... + 28311314.

It is an arithmetic number, because the mean of its divisors is an integer number (2537090451).

Almost surely, 2^78616664502 is an apocalyptic number.

78616664502 is an abundant number, since it is smaller than the sum of its proper divisors (83757124362).

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

78616664502 is a wasteful number, since it uses less digits than its factorization.

78616664502 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3713.

The product of its (nonzero) digits is 2903040, while the sum is 51.

The spelling of 78616664502 in words is "seventy-eight billion, six hundred sixteen million, six hundred sixty-four thousand, five hundred two".