56861616865 has 8 divisors (see below), whose sum is σ = 68236183080. Its totient is φ = 45487798272.

The previous prime is 56861616841. The next prime is 56861616871.

56861616865 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in 4 ways, for example, as 3249456016 + 53612160849 = 57004^2 + 231543^2 .

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 56861616865 - 2⁷ = 56861616737 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3154 + ... + 337243.

It is an arithmetic number, because the mean of its divisors is an integer number (8529522885).

Almost surely, 2^56861616865 is an apocalyptic number.

It is an amenable number.

56861616865 is a deficient number, since it is larger than the sum of its proper divisors (11374566215).

56861616865 is a wasteful number, since it uses less digits than its factorization.

56861616865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 373811.

The product of its digits is 12441600, while the sum is 58.

The spelling of 56861616865 in words is "fifty-six billion, eight hundred sixty-one million, six hundred sixteen thousand, eight hundred sixty-five".