78528864124 has 12 divisors (see below), whose sum is σ = 137429045824. Its totient is φ = 39263422464.

The previous prime is 78528864101. The next prime is 78528864149. The reversal of 78528864124 is 42146882587.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61317 + ... + 401020.

Almost surely, 2^78528864124 is an apocalyptic number.

It is an amenable number.

78528864124 is a deficient number, since it is larger than the sum of its proper divisors (58900181700).

78528864124 is a wasteful number, since it uses less digits than its factorization.

78528864124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 504804 (or 504802 counting only the distinct ones).

The product of its digits is 6881280, while the sum is 55.

The spelling of 78528864124 in words is "seventy-eight billion, five hundred twenty-eight million, eight hundred sixty-four thousand, one hundred twenty-four".