56157816 has 64 divisors (see below), whose sum is σ = 164949120. Its totient is φ = 15707520.

The previous prime is 56157799. The next prime is 56157821. The reversal of 56157816 is 61875165.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4750 + ... + 11613.

It is an arithmetic number, because the mean of its divisors is an integer number (2577330).

Almost surely, 2^56157816 is an apocalyptic number.

It is an amenable number.

56157816 is an abundant number, since it is smaller than the sum of its proper divisors (108791304).

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

56157816 is a wasteful number, since it uses less digits than its factorization.

56157816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16396 (or 16392 counting only the distinct ones).

The product of its digits is 50400, while the sum is 39.

The square root of 56157816 is about 7493.8518800414. The cubic root of 56157816 is about 382.9452936972.

It can be divided in two parts, 5615 and 7816, that added together give a palindrome (13431).

The spelling of 56157816 in words is "fifty-six million, one hundred fifty-seven thousand, eight hundred sixteen".