56655717511 has 4 divisors (see below), whose sum is σ = 59637597400. Its totient is φ = 53673837624.

The previous prime is 56655717497. The next prime is 56655717589. The reversal of 56655717511 is 11571755665.

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

It is a cyclic number.

It is not a de Polignac number, because 56655717511 - 2⁵ = 56655717479 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 (56655715511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1490939916 + ... + 1490939953.

It is an arithmetic number, because the mean of its divisors is an integer number (14909399350).

Almost surely, 2^56655717511 is an apocalyptic number.

56655717511 is a deficient number, since it is larger than the sum of its proper divisors (2981879889).

56655717511 is a wasteful number, since it uses less digits than its factorization.

56655717511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2981879888.

The product of its digits is 1102500, while the sum is 49.

The spelling of 56655717511 in words is "fifty-six billion, six hundred fifty-five million, seven hundred seventeen thousand, five hundred eleven".