56888155657 has 4 divisors (see below), whose sum is σ = 56968393540. Its totient is φ = 56807917776.

The previous prime is 56888155613. The next prime is 56888155661. The reversal of 56888155657 is 75655188865.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 75655188865 = 5 ⋅15131037773.

It can be written as a sum of positive squares in 2 ways, for example, as 24342552441 + 32545603216 = 156021^2 + 180404^2 .

It is a cyclic number.

It is not a de Polignac number, because 56888155657 - 2³¹ = 54740672009 is a prime.

It is a super-2 number, since 2×56888155657² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56888155957) 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, 40117878 + ... + 40119295.

It is an arithmetic number, because the mean of its divisors is an integer number (14242098385).

Almost surely, 2^56888155657 is an apocalyptic number.

It is an amenable number.

56888155657 is a deficient number, since it is larger than the sum of its proper divisors (80237883).

56888155657 is an equidigital number, since it uses as much as digits as its factorization.

56888155657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80237882.

The product of its digits is 80640000, while the sum is 64.

The spelling of 56888155657 in words is "fifty-six billion, eight hundred eighty-eight million, one hundred fifty-five thousand, six hundred fifty-seven".