56955561 has 32 divisors (see below), whose sum is σ = 84446208. Its totient is φ = 33929280.

The previous prime is 56955557. The next prime is 56955581. The reversal of 56955561 is 16555965.

It is not a de Polignac number, because 56955561 - 2² = 56955557 is a prime.

It is not an unprimeable number, because it can be changed into a prime (56955511) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 185370 + ... + 185676.

It is an arithmetic number, because the mean of its divisors is an integer number (2638944).

Almost surely, 2^56955561 is an apocalyptic number.

It is an amenable number.

56955561 is a deficient number, since it is larger than the sum of its proper divisors (27490647).

56955561 is a wasteful number, since it uses less digits than its factorization.

56955561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 461.

The product of its digits is 202500, while the sum is 42.

The square root of 56955561 is about 7546.8908167536. The cubic root of 56955561 is about 384.7500733580.

The spelling of 56955561 in words is "fifty-six million, nine hundred fifty-five thousand, five hundred sixty-one".