56813031865 has 8 divisors (see below), whose sum is σ = 68609878920. Its totient is φ = 45160931712.

The previous prime is 56813031787. The next prime is 56813031881.

56813031865 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in 4 ways, for example, as 140944384 + 56672087481 = 11872^2 + 238059^2 .

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 56813031865 - 2¹⁵ = 56812999097 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36185860 + ... + 36187429.

It is an arithmetic number, because the mean of its divisors is an integer number (8576234865).

Almost surely, 2^56813031865 is an apocalyptic number.

It is an amenable number.

56813031865 is a deficient number, since it is larger than the sum of its proper divisors (11796847055).

56813031865 is a wasteful number, since it uses less digits than its factorization.

56813031865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72373451.

The product of its (nonzero) digits is 518400, while the sum is 46.

It can be divided in two parts, 568130 and 31865, that added together give a palindrome (599995).

The spelling of 56813031865 in words is "fifty-six billion, eight hundred thirteen million, thirty-one thousand, eight hundred sixty-five".