57556328281 has 27 divisors (see below), whose sum is σ = 60880813119. Its totient is φ = 54411361200.

The previous prime is 57556328261. The next prime is 57556328339. The reversal of 57556328281 is 18282365575.

The square root of 57556328281 is 239909.

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

It can be written as a sum of positive squares in only one way, i.e., 40116484681 + 17439843600 = 200291^2 + 132060^2 .

It is not a de Polignac number, because 57556328281 - 2⁷ = 57556328153 is a prime.

It is a super-2 number, since 2×57556328281² (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 (57556328261) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 528039655 + ... + 528039763.

Almost surely, 2^57556328281 is an apocalyptic number.

57556328281 is the 239909-th square number.

57556328281 is the 119955-th centered octagonal number.

It is an amenable number.

57556328281 is a deficient number, since it is larger than the sum of its proper divisors (3324484838).

57556328281 is an frugal number, since it uses more digits than its factorization.

57556328281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 422 (or 211 counting only the distinct ones).

The product of its digits is 4032000, while the sum is 52.

The spelling of 57556328281 in words is "fifty-seven billion, five hundred fifty-six million, three hundred twenty-eight thousand, two hundred eighty-one".