56955681 has 24 divisors (see below), whose sum is σ = 86935680. Its totient is φ = 35873376.

The previous prime is 56955643. The next prime is 56955713. The reversal of 56955681 is 18655965.

It is a happy number.

56955681 is a `hidden beast` number, since 569 + 5 + 5 + 6 + 81 = 666.

It is not a de Polignac number, because 56955681 - 2⁷ = 56955553 is a prime.

It is a super-2 number, since 2×56955681² = 6487899196347522, which contains 22 as substring.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (56955641) 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 23 ways as a sum of consecutive naturals, for example, 9946 + ... + 14588.

It is an arithmetic number, because the mean of its divisors is an integer number (3622320).

Almost surely, 2^56955681 is an apocalyptic number.

It is an amenable number.

56955681 is a deficient number, since it is larger than the sum of its proper divisors (29979999).

56955681 is a wasteful number, since it uses less digits than its factorization.

56955681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4725 (or 4722 counting only the distinct ones).

The product of its digits is 324000, while the sum is 45.

The square root of 56955681 is about 7546.8987670433. The cubic root of 56955681 is about 384.7503435685.

The spelling of 56955681 in words is "fifty-six million, nine hundred fifty-five thousand, six hundred eighty-one".