572118561 has 81 divisors (see below), whose sum is σ = 1036658259. Its totient is φ = 303101568.

The previous prime is 572118541. The next prime is 572118563. The reversal of 572118561 is 165811275.

The square root of 572118561 is 23919.

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

572118561 is a `hidden beast` number, since 572 + 1 + 1 + 85 + 6 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 445421025 + 126697536 = 21105^2 + 11256^2 .

It is not a de Polignac number, because 572118561 - 2⁹ = 572118049 is a prime.

It is not an unprimeable number, because it can be changed into a prime (572118563) 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, 8539050 + ... + 8539116.

Almost surely, 2^572118561 is an apocalyptic number.

572118561 is a gapful number since it is divisible by the number (51) formed by its first and last digit.

572118561 is the 23919-th square number.

572118561 is the 11960-th centered octagonal number.

It is an amenable number.

572118561 is a deficient number, since it is larger than the sum of its proper divisors (464539698).

572118561 is a wasteful number, since it uses less digits than its factorization.

572118561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188 (or 94 counting only the distinct ones).

The product of its digits is 16800, while the sum is 36.

The cubic root of 572118561 is about 830.1603991549.

Multiplying 572118561 by its sum of digits (36), we get a square (20596268196 = 143514²).

The spelling of 572118561 in words is "five hundred seventy-two million, one hundred eighteen thousand, five hundred sixty-one".