56261562613 has 4 divisors (see below), whose sum is σ = 57215148480. Its totient is φ = 55307976748.

The previous prime is 56261562583. The next prime is 56261562629. The reversal of 56261562613 is 31626516265.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 31626516265 = 5 ⋅6325303253.

It is a cyclic number.

It is not a de Polignac number, because 56261562613 - 2²¹ = 56259465461 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 56261562613.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56261562673) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 476792845 + ... + 476792962.

It is an arithmetic number, because the mean of its divisors is an integer number (14303787120).

Almost surely, 2^56261562613 is an apocalyptic number.

It is an amenable number.

56261562613 is a deficient number, since it is larger than the sum of its proper divisors (953585867).

56261562613 is an equidigital number, since it uses as much as digits as its factorization.

56261562613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 953585866.

The product of its digits is 388800, while the sum is 43.

The spelling of 56261562613 in words is "fifty-six billion, two hundred sixty-one million, five hundred sixty-two thousand, six hundred thirteen".