56615544 has 32 divisors (see below), whose sum is σ = 157266000. Its totient is φ = 18871776.

The previous prime is 56615543. The next prime is 56615549. The reversal of 56615544 is 44551665.

56615544 is a `hidden beast` number, since 56 + 61 + 5 + 544 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 56615499 and 56615508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56615543) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 130839 + ... + 131270.

Almost surely, 2^56615544 is an apocalyptic number.

56615544 is a gapful number since it is divisible by the number (54) formed by its first and last digit.

It is an amenable number.

56615544 is an abundant number, since it is smaller than the sum of its proper divisors (100650456).

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

56615544 is a wasteful number, since it uses less digits than its factorization.

56615544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 262124 (or 262114 counting only the distinct ones).

The product of its digits is 72000, while the sum is 36.

The square root of 56615544 is about 7524.3301362978. The cubic root of 56615544 is about 383.9829093956.

It can be divided in two parts, 566 and 15544, that added together give a triangular number (16110 = T₁₇₉).

The spelling of 56615544 in words is "fifty-six million, six hundred fifteen thousand, five hundred forty-four".