56000645 has 4 divisors (see below), whose sum is σ = 67200780. Its totient is φ = 44800512.

The previous prime is 56000639. The next prime is 56000671. The reversal of 56000645 is 54600065.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 12348196 + 43652449 = 3514^2 + 6607^2 .

It is a cyclic number.

It is not a de Polignac number, because 56000645 - 2⁸ = 56000389 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5600060 + ... + 5600069.

It is an arithmetic number, because the mean of its divisors is an integer number (16800195).

Almost surely, 2^56000645 is an apocalyptic number.

It is an amenable number.

56000645 is a deficient number, since it is larger than the sum of its proper divisors (11200135).

56000645 is a wasteful number, since it uses less digits than its factorization.

56000645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11200134.

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 56000645 is about 7483.3578692990. The cubic root of 56000645 is about 382.5877054067.

The spelling of 56000645 in words is "fifty-six million, six hundred forty-five", and thus it is an aban number.