56516945 has 8 divisors (see below), whose sum is σ = 69653544. Its totient is φ = 43991424.

The previous prime is 56516909. The next prime is 56516951. The reversal of 56516945 is 54961565.

56516945 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 30547729 + 25969216 = 5527^2 + 5096^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 56516945 - 2²⁴ = 39739729 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 152564 + ... + 152933.

It is an arithmetic number, because the mean of its divisors is an integer number (8706693).

Almost surely, 2^56516945 is an apocalyptic number.

It is an amenable number.

56516945 is a deficient number, since it is larger than the sum of its proper divisors (13136599).

56516945 is a wasteful number, since it uses less digits than its factorization.

56516945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 305539.

The product of its digits is 162000, while the sum is 41.

The square root of 56516945 is about 7517.7752693200. The cubic root of 56516945 is about 383.7598709384.

The spelling of 56516945 in words is "fifty-six million, five hundred sixteen thousand, nine hundred forty-five".