56700266557 has 4 divisors (see below), whose sum is σ = 61854836256. Its totient is φ = 51545696860.

The previous prime is 56700266527. The next prime is 56700266561. The reversal of 56700266557 is 75566200765.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56700266557 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 56700266557.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56700266527) 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, 2577284833 + ... + 2577284854.

It is an arithmetic number, because the mean of its divisors is an integer number (15463709064).

Almost surely, 2^56700266557 is an apocalyptic number.

It is an amenable number.

56700266557 is a deficient number, since it is larger than the sum of its proper divisors (5154569699).

56700266557 is a wasteful number, since it uses less digits than its factorization.

56700266557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5154569698.

The product of its (nonzero) digits is 2646000, while the sum is 49.

The spelling of 56700266557 in words is "fifty-six billion, seven hundred million, two hundred sixty-six thousand, five hundred fifty-seven".