56577561 has 8 divisors (see below), whose sum is σ = 76673664. Its totient is φ = 37099920.

The previous prime is 56577541. The next prime is 56577569. The reversal of 56577561 is 16577565.

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

It is not a de Polignac number, because 56577561 - 2⁵ = 56577529 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (56577569) 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, 154401 + ... + 154766.

It is an arithmetic number, because the mean of its divisors is an integer number (9584208).

Almost surely, 2^56577561 is an apocalyptic number.

It is an amenable number.

56577561 is a deficient number, since it is larger than the sum of its proper divisors (20096103).

56577561 is a wasteful number, since it uses less digits than its factorization.

56577561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 309231.

The product of its digits is 220500, while the sum is 42.

The square root of 56577561 is about 7521.8057007610. The cubic root of 56577561 is about 383.8970196402.

The spelling of 56577561 in words is "fifty-six million, five hundred seventy-seven thousand, five hundred sixty-one".