56173656 has 128 divisors (see below), whose sum is σ = 177292800. Its totient is φ = 14407680.

The previous prime is 56173639. The next prime is 56173657. The reversal of 56173656 is 65637165.

Its product of digits (113400) is a multiple of the sum of its prime divisors (405).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56173657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 208690 + ... + 208958.

It is an arithmetic number, because the mean of its divisors is an integer number (1385100).

Almost surely, 2^56173656 is an apocalyptic number.

56173656 is a gapful number since it is divisible by the number (56) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 56173656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (88646400).

56173656 is an abundant number, since it is smaller than the sum of its proper divisors (121119144).

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

56173656 is a wasteful number, since it uses less digits than its factorization.

56173656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 409 (or 405 counting only the distinct ones).

The product of its digits is 113400, while the sum is 39.

The square root of 56173656 is about 7494.9086718919. The cubic root of 56173656 is about 382.9812951164.

The spelling of 56173656 in words is "fifty-six million, one hundred seventy-three thousand, six hundred fifty-six".