56645613 has 12 divisors (see below), whose sum is σ = 84643260. Its totient is φ = 36461376.

The previous prime is 56645609. The next prime is 56645621. The reversal of 56645613 is 31654665.

56645613 is a `hidden beast` number, since 5 + 6 + 645 + 6 + 1 + 3 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 13638249 + 43007364 = 3693^2 + 6558^2 .

It is not a de Polignac number, because 56645613 - 2² = 56645609 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56645653) 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, 108256 + ... + 108777.

It is an arithmetic number, because the mean of its divisors is an integer number (7053605).

Almost surely, 2^56645613 is an apocalyptic number.

It is an amenable number.

56645613 is a deficient number, since it is larger than the sum of its proper divisors (27997647).

56645613 is a wasteful number, since it uses less digits than its factorization.

56645613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217068 (or 217065 counting only the distinct ones).

The product of its digits is 64800, while the sum is 36.

The square root of 56645613 is about 7526.3279891325. The cubic root of 56645613 is about 384.0508762344.

The spelling of 56645613 in words is "fifty-six million, six hundred forty-five thousand, six hundred thirteen".