78715715108 has 24 divisors (see below), whose sum is σ = 143752301952. Its totient is φ = 37643880384.

The previous prime is 78715715101. The next prime is 78715715119. The reversal of 78715715108 is 80151751787.

It is not an unprimeable number, because it can be changed into a prime (78715715101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1811816 + ... + 1854752.

It is an arithmetic number, because the mean of its divisors is an integer number (5989679248).

Almost surely, 2^78715715108 is an apocalyptic number.

It is an amenable number.

78715715108 is a deficient number, since it is larger than the sum of its proper divisors (65036586844).

78715715108 is a wasteful number, since it uses less digits than its factorization.

78715715108 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62891 (or 62889 counting only the distinct ones).

The product of its (nonzero) digits is 548800, while the sum is 50.

The spelling of 78715715108 in words is "seventy-eight billion, seven hundred fifteen million, seven hundred fifteen thousand, one hundred eight".