78956839518 has 16 divisors (see below), whose sum is σ = 164779491456. Its totient is φ = 25174644440.

The previous prime is 78956839501. The next prime is 78956839519. The reversal of 78956839518 is 81593865987.

It is a Harshad number since it is a multiple of its sum of digits (69).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78956839519) 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, 286075368 + ... + 286075643.

It is an arithmetic number, because the mean of its divisors is an integer number (10298718216).

Almost surely, 2^78956839518 is an apocalyptic number.

78956839518 is an abundant number, since it is smaller than the sum of its proper divisors (85822651938).

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

78956839518 is a wasteful number, since it uses less digits than its factorization.

78956839518 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 572151039.

The product of its digits is 130636800, while the sum is 69.

The spelling of 78956839518 in words is "seventy-eight billion, nine hundred fifty-six million, eight hundred thirty-nine thousand, five hundred eighteen".