56515689 has 12 divisors (see below), whose sum is σ = 81699072. Its totient is φ = 37647000.

The previous prime is 56515673. The next prime is 56515691. The reversal of 56515689 is 98651565.

It is a happy number.

56515689 is a `hidden beast` number, since 56 + 515 + 6 + 89 = 666.

It is not a de Polignac number, because 56515689 - 2⁴ = 56515673 is a prime.

It is not an unprimeable number, because it can be changed into a prime (56515699) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19824 + ... + 22494.

It is an arithmetic number, because the mean of its divisors is an integer number (6808256).

Almost surely, 2^56515689 is an apocalyptic number.

It is an amenable number.

56515689 is a deficient number, since it is larger than the sum of its proper divisors (25183383).

56515689 is a wasteful number, since it uses less digits than its factorization.

56515689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5028 (or 5025 counting only the distinct ones).

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

The square root of 56515689 is about 7517.6917335044. The cubic root of 56515689 is about 383.7570280979.

The spelling of 56515689 in words is "fifty-six million, five hundred fifteen thousand, six hundred eighty-nine".