56561617 has 8 divisors (see below), whose sum is σ = 64699712. Its totient is φ = 48438000.

The previous prime is 56561563. The next prime is 56561621. The reversal of 56561617 is 71616565.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56561617 is a prime.

It is not an unprimeable number, because it can be changed into a prime (56561627) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6742 + ... + 12592.

It is an arithmetic number, because the mean of its divisors is an integer number (8087464).

Almost surely, 2^56561617 is an apocalyptic number.

It is an amenable number.

56561617 is a deficient number, since it is larger than the sum of its proper divisors (8138095).

56561617 is a wasteful number, since it uses less digits than its factorization.

56561617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7239.

The product of its digits is 37800, while the sum is 37.

The square root of 56561617 is about 7520.7457741902. The cubic root of 56561617 is about 383.8609545228.

The spelling of 56561617 in words is "fifty-six million, five hundred sixty-one thousand, six hundred seventeen".