856318816 has 24 divisors (see below), whose sum is σ = 1695307320. Its totient is φ = 425764608.

The previous prime is 856318811. The next prime is 856318829. The reversal of 856318816 is 618813658.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (856318811) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 69021 + ... + 80476.

It is an arithmetic number, because the mean of its divisors is an integer number (70637805).

Almost surely, 2^856318816 is an apocalyptic number.

It is an amenable number.

856318816 is a deficient number, since it is larger than the sum of its proper divisors (838988504).

856318816 is a wasteful number, since it uses less digits than its factorization.

856318816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149686 (or 149678 counting only the distinct ones).

The product of its digits is 276480, while the sum is 46.

The square root of 856318816 is about 29262.9256227056. The cubic root of 856318816 is about 949.6097440463.

The spelling of 856318816 in words is "eight hundred fifty-six million, three hundred eighteen thousand, eight hundred sixteen".