56540561 has 24 divisors (see below), whose sum is σ = 75540960. Its totient is φ = 41731200.

The previous prime is 56540531. The next prime is 56540579. The reversal of 56540561 is 16504565.

It is not a de Polignac number, because 56540561 - 2¹⁴ = 56524177 is a prime.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (56540501) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7481 + ... + 13001.

It is an arithmetic number, because the mean of its divisors is an integer number (3147540).

Almost surely, 2^56540561 is an apocalyptic number.

It is an amenable number.

56540561 is a deficient number, since it is larger than the sum of its proper divisors (19000399).

56540561 is a wasteful number, since it uses less digits than its factorization.

56540561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5565 (or 5558 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 32.

The square root of 56540561 is about 7519.3457827127. The cubic root of 56540561 is about 383.8133157420.

The spelling of 56540561 in words is "fifty-six million, five hundred forty thousand, five hundred sixty-one".