56905569 has 24 divisors (see below), whose sum is σ = 97181760. Its totient is φ = 31395168.

The previous prime is 56905561. The next prime is 56905601. The reversal of 56905569 is 96550965.

56905569 is a `hidden beast` number, since 5 + 6 + 90 + 556 + 9 = 666.

56905569 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 56905569 - 2³ = 56905561 is a prime.

It is a super-2 number, since 2×56905569² = 6476487566427522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56905561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13747 + ... + 17400.

It is an arithmetic number, because the mean of its divisors is an integer number (4049240).

Almost surely, 2^56905569 is an apocalyptic number.

It is an amenable number.

56905569 is a deficient number, since it is larger than the sum of its proper divisors (40276191).

56905569 is a wasteful number, since it uses less digits than its factorization.

56905569 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31189 (or 31186 counting only the distinct ones).

The product of its (nonzero) digits is 364500, while the sum is 45.

The square root of 56905569 is about 7543.5779972106. The cubic root of 56905569 is about 384.6374706220.

The spelling of 56905569 in words is "fifty-six million, nine hundred five thousand, five hundred sixty-nine".