56657816239 has 4 divisors (see below), whose sum is σ = 56658661840. Its totient is φ = 56656970640.

The previous prime is 56657816203. The next prime is 56657816261. The reversal of 56657816239 is 93261875665.

56657816239 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56657816239 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56657816279) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 312747 + ... + 459484.

It is an arithmetic number, because the mean of its divisors is an integer number (14164665460).

Almost surely, 2^56657816239 is an apocalyptic number.

56657816239 is a deficient number, since it is larger than the sum of its proper divisors (845601).

56657816239 is an equidigital number, since it uses as much as digits as its factorization.

56657816239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 845600.

The product of its digits is 16329600, while the sum is 58.

The spelling of 56657816239 in words is "fifty-six billion, six hundred fifty-seven million, eight hundred sixteen thousand, two hundred thirty-nine".