56576809 has 4 divisors (see below), whose sum is σ = 56759040. Its totient is φ = 56394580.

The previous prime is 56576801. The next prime is 56576869. The reversal of 56576809 is 90867565.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 56576809 - 2³ = 56576801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56576801) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 90649 + ... + 91270.

It is an arithmetic number, because the mean of its divisors is an integer number (14189760).

Almost surely, 2^56576809 is an apocalyptic number.

It is an amenable number.

56576809 is a deficient number, since it is larger than the sum of its proper divisors (182231).

56576809 is a wasteful number, since it uses less digits than its factorization.

56576809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182230.

The product of its (nonzero) digits is 453600, while the sum is 46.

The square root of 56576809 is about 7521.7557125980. The cubic root of 56576809 is about 383.8953187784.

The spelling of 56576809 in words is "fifty-six million, five hundred seventy-six thousand, eight hundred nine".