56706561 has 10 divisors (see below), whose sum is σ = 84709922. Its totient is φ = 37804320.

The previous prime is 56706557. The next prime is 56706593. The reversal of 56706561 is 16560765.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 53934336 + 2772225 = 7344^2 + 1665^2 .

It is not a de Polignac number, because 56706561 - 2² = 56706557 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56706521) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 349960 + ... + 350121.

Almost surely, 2^56706561 is an apocalyptic number.

It is an amenable number.

56706561 is a deficient number, since it is larger than the sum of its proper divisors (28003361).

56706561 is an equidigital number, since it uses as much as digits as its factorization.

56706561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 700093 (or 700084 counting only the distinct ones).

The product of its (nonzero) digits is 37800, while the sum is 36.

The square root of 56706561 is about 7530.3758870325. The cubic root of 56706561 is about 384.1885670551.

The spelling of 56706561 in words is "fifty-six million, seven hundred six thousand, five hundred sixty-one".