56818812557 has 8 divisors (see below), whose sum is σ = 61215136920. Its totient is φ = 52426152000.

The previous prime is 56818812527. The next prime is 56818812563. The reversal of 56818812557 is 75521881865.

56818812557 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 1603682116 + 55215130441 = 40046^2 + 234979^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 56818812557 - 2¹⁶ = 56818747021 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 (56818812517) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 883694 + ... + 945807.

It is an arithmetic number, because the mean of its divisors is an integer number (7651892115).

Almost surely, 2^56818812557 is an apocalyptic number.

It is an amenable number.

56818812557 is a deficient number, since it is larger than the sum of its proper divisors (4396324363).

56818812557 is a wasteful number, since it uses less digits than its factorization.

56818812557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1831903.

The product of its digits is 5376000, while the sum is 56.

The spelling of 56818812557 in words is "fifty-six billion, eight hundred eighteen million, eight hundred twelve thousand, five hundred fifty-seven".