78125882715 has 24 divisors (see below), whose sum is σ = 139786528128. Its totient is φ = 40323035520.

The previous prime is 78125882671. The next prime is 78125882741. The reversal of 78125882715 is 51728852187.

It is not a de Polignac number, because 78125882715 - 2²⁸ = 77857447259 is a prime.

It is a super-2 number, since 2×78125882715² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 28000714 + ... + 28003503.

It is an arithmetic number, because the mean of its divisors is an integer number (5824438672).

Almost surely, 2^78125882715 is an apocalyptic number.

78125882715 is a deficient number, since it is larger than the sum of its proper divisors (61660645413).

78125882715 is a wasteful number, since it uses less digits than its factorization.

78125882715 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56004259 (or 56004256 counting only the distinct ones).

The product of its digits is 2508800, while the sum is 54.

The spelling of 78125882715 in words is "seventy-eight billion, one hundred twenty-five million, eight hundred eighty-two thousand, seven hundred fifteen".