56718929761 has 12 divisors (see below), whose sum is σ = 65030339052. Its totient is φ = 49276171776.

The previous prime is 56718929749. The next prime is 56718929779. The reversal of 56718929761 is 16792981765.

It can be written as a sum of positive squares in 6 ways, for example, as 4709390625 + 52009539136 = 68625^2 + 228056^2 .

It is not a de Polignac number, because 56718929761 - 2³³ = 48128995169 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 56718929761.

It is not an unprimeable number, because it can be changed into a prime (56718929741) 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 11 ways as a sum of consecutive naturals, for example, 9868156 + ... + 9873901.

It is an arithmetic number, because the mean of its divisors is an integer number (5419194921).

Almost surely, 2^56718929761 is an apocalyptic number.

It is an amenable number.

56718929761 is a deficient number, since it is larger than the sum of its proper divisors (8311409291).

56718929761 is a wasteful number, since it uses less digits than its factorization.

56718929761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19742100 (or 19742087 counting only the distinct ones).

The product of its digits is 11430720, while the sum is 61.

It can be divided in two parts, 56 and 718929761, that added together give a palindrome (718929817).

The spelling of 56718929761 in words is "fifty-six billion, seven hundred eighteen million, nine hundred twenty-nine thousand, seven hundred sixty-one".