56206564613 has 4 divisors (see below), whose sum is σ = 56207304780. Its totient is φ = 56205824448.

The previous prime is 56206564577. The next prime is 56206564621. The reversal of 56206564613 is 31646560265.

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

It can be written as a sum of positive squares in 2 ways, for example, as 27407795809 + 28798768804 = 165553^2 + 169702^2 .

It is a cyclic number.

It is not a de Polignac number, because 56206564613 - 2⁶ = 56206564549 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 (56206564643) 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, 241220 + ... + 413037.

It is an arithmetic number, because the mean of its divisors is an integer number (14051826195).

Almost surely, 2^56206564613 is an apocalyptic number.

It is an amenable number.

56206564613 is a deficient number, since it is larger than the sum of its proper divisors (740167).

56206564613 is an equidigital number, since it uses as much as digits as its factorization.

56206564613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 740166.

The product of its (nonzero) digits is 777600, while the sum is 44.

The spelling of 56206564613 in words is "fifty-six billion, two hundred six million, five hundred sixty-four thousand, six hundred thirteen".