78564163794 has 16 divisors (see below), whose sum is σ = 159117294720. Its totient is φ = 25856560080.

The previous prime is 78564163787. The next prime is 78564163819. The reversal of 78564163794 is 49736146587.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 82873117 + ... + 82874064.

It is an arithmetic number, because the mean of its divisors is an integer number (9944830920).

Almost surely, 2^78564163794 is an apocalyptic number.

78564163794 is an abundant number, since it is smaller than the sum of its proper divisors (80553130926).

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

78564163794 is a wasteful number, since it uses less digits than its factorization.

78564163794 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165747265.

The product of its digits is 30481920, while the sum is 60.

The spelling of 78564163794 in words is "seventy-eight billion, five hundred sixty-four million, one hundred sixty-three thousand, seven hundred ninety-four".