78815163936 has 24 divisors (see below), whose sum is σ = 206889805584. Its totient is φ = 26271721280.

The previous prime is 78815163883. The next prime is 78815163961. The reversal of 78815163936 is 63936151887.

It is a tau number, because it is divible by the number of its divisors (24).

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, 410495550 + ... + 410495741.

It is an arithmetic number, because the mean of its divisors is an integer number (8620408566).

Almost surely, 2^78815163936 is an apocalyptic number.

It is an amenable number.

78815163936 is an abundant number, since it is smaller than the sum of its proper divisors (128074641648).

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

78815163936 is a wasteful number, since it uses less digits than its factorization.

78815163936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 820991304 (or 820991296 counting only the distinct ones).

The product of its digits is 6531840, while the sum is 57.

The spelling of 78815163936 in words is "seventy-eight billion, eight hundred fifteen million, one hundred sixty-three thousand, nine hundred thirty-six".