52757036721 has 63 divisors (see below), whose sum is σ = 81267119643. Its totient is φ = 34232848560.

The previous prime is 52757036687. The next prime is 52757036741. The reversal of 52757036721 is 12763075725.

The square root of 52757036721 is 229689.

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

52757036721 is a `hidden beast` number, since 5 + 2 + 7 + 570 + 3 + 6 + 72 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 581340321 + 52175696400 = 24111^2 + 228420^2 .

It is not a de Polignac number, because 52757036721 - 2⁷ = 52757036593 is a prime.

It is not an unprimeable number, because it can be changed into a prime (52757036741) by changing a digit.

It is a polite number, since it can be written in 62 ways as a sum of consecutive naturals, for example, 291475251 + ... + 291475431.

Almost surely, 2^52757036721 is an apocalyptic number.

52757036721 is the 229689-th square number.

52757036721 is the 114845-th centered octagonal number.

It is an amenable number.

52757036721 is a deficient number, since it is larger than the sum of its proper divisors (28510082922).

52757036721 is an frugal number, since it uses more digits than its factorization.

52757036721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 474 (or 231 counting only the distinct ones).

The product of its (nonzero) digits is 617400, while the sum is 45.

The spelling of 52757036721 in words is "fifty-two billion, seven hundred fifty-seven million, thirty-six thousand, seven hundred twenty-one".