56866107409 has 16 divisors (see below), whose sum is σ = 58327673040. Its totient is φ = 55423872000.

The previous prime is 56866107367. The next prime is 56866107427. The reversal of 56866107409 is 90470166865.

It can be written as a sum of positive squares in 8 ways, for example, as 15732183184 + 41133924225 = 125428^2 + 202815^2 .

It is a cyclic number.

It is not a de Polignac number, because 56866107409 - 2¹⁵ = 56866074641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56866107439) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3093357 + ... + 3111685.

It is an arithmetic number, because the mean of its divisors is an integer number (3645479565).

Almost surely, 2^56866107409 is an apocalyptic number.

It is an amenable number.

56866107409 is a deficient number, since it is larger than the sum of its proper divisors (1461565631).

56866107409 is a wasteful number, since it uses less digits than its factorization.

56866107409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18852.

The product of its (nonzero) digits is 2177280, while the sum is 52.

The spelling of 56866107409 in words is "fifty-six billion, eight hundred sixty-six million, one hundred seven thousand, four hundred nine".