878504312856 has 32 divisors (see below), whose sum is σ = 2197256048640. Its totient is φ = 292702068768.

The previous prime is 878504312849. The next prime is 878504312897. The reversal of 878504312856 is 658213405878.

It is a junction number, because it is equal to n+sod(n) for n = 878504312796 and 878504312805.

It is a congruent number.

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, 8239816 + ... + 8345751.

It is an arithmetic number, because the mean of its divisors is an integer number (68664251520).

Almost surely, 2^878504312856 is an apocalyptic number.

It is an amenable number.

878504312856 is an abundant number, since it is smaller than the sum of its proper divisors (1318751735784).

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

878504312856 is a wasteful number, since it uses less digits than its factorization.

878504312856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16587783 (or 16587779 counting only the distinct ones).

The product of its (nonzero) digits is 12902400, while the sum is 57.

The spelling of 878504312856 in words is "eight hundred seventy-eight billion, five hundred four million, three hundred twelve thousand, eight hundred fifty-six".