57721023504 has 45 divisors (see below), whose sum is σ = 161546766589. Its totient is φ = 19239380160.

The previous prime is 57721023461. The next prime is 57721023517. The reversal of 57721023504 is 40532012775.

The square root of 57721023504 is 240252.

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

57721023504 is a `hidden beast` number, since 57 + 72 + 10 + 23 + 504 = 666.

It can be written as a sum of positive squares in only one way, i.e., 2514821904 + 55206201600 = 50148^2 + 234960^2 .

It is a super-3 number, since 3×57721023504³ (a number of 33 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 2873014 + ... + 2893034.

Almost surely, 2^57721023504 is an apocalyptic number.

57721023504 is the 240252-nd square number.

It is an amenable number.

57721023504 is an abundant number, since it is smaller than the sum of its proper divisors (103825743085).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

57721023504 is an frugal number, since it uses more digits than its factorization.

57721023504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40056 (or 20026 counting only the distinct ones).

The product of its (nonzero) digits is 58800, while the sum is 36.

Multiplying 57721023504 by its sum of digits (36), we get a square (2077956846144 = 1441512²).

57721023504 divided by its sum of digits (36) gives a square (1603361764 = 40042²).

The spelling of 57721023504 in words is "fifty-seven billion, seven hundred twenty-one million, twenty-three thousand, five hundred four".