856712837824 has 28 divisors (see below), whose sum is σ = 1739575346344. Its totient is φ = 418394640384.

The previous prime is 856712837803. The next prime is 856712837833. The reversal of 856712837824 is 428738217658.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 155650017 + ... + 155655520.

Almost surely, 2^856712837824 is an apocalyptic number.

It is an amenable number.

856712837824 is an abundant number, since it is smaller than the sum of its proper divisors (882862508520).

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

856712837824 is a wasteful number, since it uses less digits than its factorization.

856712837824 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 311305592 (or 311305582 counting only the distinct ones).

The product of its digits is 36126720, while the sum is 61.

The spelling of 856712837824 in words is "eight hundred fifty-six billion, seven hundred twelve million, eight hundred thirty-seven thousand, eight hundred twenty-four".