56958118281 has 81 divisors (see below), whose sum is σ = 89634554919. Its totient is φ = 34848032544.

The previous prime is 56958118267. The next prime is 56958118303. The reversal of 56958118281 is 18281185965.

The square root of 56958118281 is 238659.

It is a perfect power (a square), and thus also a powerful number.

56958118281 is a `hidden beast` number, since 56 + 9 + 581 + 1 + 8 + 2 + 8 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 41060943225 + 15897175056 = 202635^2 + 126084^2 .

It is not a de Polignac number, because 56958118281 - 2²⁹ = 56421247369 is a prime.

It is a super-2 number, since 2×56958118281² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (56958118241) by changing a digit.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 720988800 + ... + 720988878.

Almost surely, 2^56958118281 is an apocalyptic number.

56958118281 is the 238659-th square number.

56958118281 is the 119330-th centered octagonal number.

It is an amenable number.

56958118281 is a deficient number, since it is larger than the sum of its proper divisors (32676436638).

56958118281 is an equidigital number, since it uses as much as digits as its factorization.

56958118281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 308 (or 154 counting only the distinct ones).

The product of its digits is 1382400, while the sum is 54.

The spelling of 56958118281 in words is "fifty-six billion, nine hundred fifty-eight million, one hundred eighteen thousand, two hundred eighty-one".