56858836813 has 2 divisors, whose sum is σ = 56858836814. Its totient is φ = 56858836812.

The previous prime is 56858836759. The next prime is 56858836817. The reversal of 56858836813 is 31863885865.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 45992233764 + 10866603049 = 214458^2 + 104243^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56858836813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56858836817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28429418406 + 28429418407.

It is an arithmetic number, because the mean of its divisors is an integer number (28429418407).

Almost surely, 2^56858836813 is an apocalyptic number.

It is an amenable number.

56858836813 is a deficient number, since it is larger than the sum of its proper divisors (1).

56858836813 is an equidigital number, since it uses as much as digits as its factorization.

56858836813 is an evil number, because the sum of its binary digits is even.

The product of its digits is 33177600, while the sum is 61.

The spelling of 56858836813 in words is "fifty-six billion, eight hundred fifty-eight million, eight hundred thirty-six thousand, eight hundred thirteen".