56871710881 has 2 divisors, whose sum is σ = 56871710882. Its totient is φ = 56871710880.

The previous prime is 56871710873. The next prime is 56871710957. The reversal of 56871710881 is 18801717865.

56871710881 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 55009011600 + 1862699281 = 234540^2 + 43159^2 .

It is a cyclic number.

It is not a de Polignac number, because 56871710881 - 2³ = 56871710873 is a prime.

It is a super-2 number, since 2×56871710881² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (56871720881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28435855440 + 28435855441.

It is an arithmetic number, because the mean of its divisors is an integer number (28435855441).

Almost surely, 2^56871710881 is an apocalyptic number.

It is an amenable number.

56871710881 is a deficient number, since it is larger than the sum of its proper divisors (1).

56871710881 is an equidigital number, since it uses as much as digits as its factorization.

56871710881 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 752640, while the sum is 52.

The spelling of 56871710881 in words is "fifty-six billion, eight hundred seventy-one million, seven hundred ten thousand, eight hundred eighty-one".