56543656 has 16 divisors (see below), whose sum is σ = 114174900. Its totient is φ = 26097024.

The previous prime is 56543651. The next prime is 56543681. The reversal of 56543656 is 65634565.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 56100100 + 443556 = 7490^2 + 666^2 .

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (56543651) 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, 271741 + ... + 271948.

Almost surely, 2^56543656 is an apocalyptic number.

It is an amenable number.

56543656 is an abundant number, since it is smaller than the sum of its proper divisors (57631244).

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

56543656 is a wasteful number, since it uses less digits than its factorization.

56543656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 543708 (or 543704 counting only the distinct ones).

The product of its digits is 324000, while the sum is 40.

The square root of 56543656 is about 7519.5515823751. The cubic root of 56543656 is about 383.8203188592.

Subtracting 56543656 from its reverse (65634565), we obtain a palindrome (9090909).

The spelling of 56543656 in words is "fifty-six million, five hundred forty-three thousand, six hundred fifty-six".