872857872856 has 16 divisors (see below), whose sum is σ = 1689402335040. Its totient is φ = 422350583520.

The previous prime is 872857872833. The next prime is 872857872881. The reversal of 872857872856 is 658278758278.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1759793851 + ... + 1759794346.

It is an arithmetic number, because the mean of its divisors is an integer number (105587645940).

Almost surely, 2^872857872856 is an apocalyptic number.

It is an amenable number.

872857872856 is a deficient number, since it is larger than the sum of its proper divisors (816544462184).

872857872856 is a wasteful number, since it uses less digits than its factorization.

872857872856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3519588234 (or 3519588230 counting only the distinct ones).

The product of its digits is 842956800, while the sum is 73.

The spelling of 872857872856 in words is "eight hundred seventy-two billion, eight hundred fifty-seven million, eight hundred seventy-two thousand, eight hundred fifty-six".