57572521261 has 4 divisors (see below), whose sum is σ = 57845377024. Its totient is φ = 57299665500.

The previous prime is 57572521241. The next prime is 57572521289. The reversal of 57572521261 is 16212527575.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 57572521261 - 2⁷ = 57572521133 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57572521241) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 136427565 + ... + 136427986.

It is an arithmetic number, because the mean of its divisors is an integer number (14461344256).

Almost surely, 2^57572521261 is an apocalyptic number.

It is an amenable number.

57572521261 is a deficient number, since it is larger than the sum of its proper divisors (272855763).

57572521261 is a wasteful number, since it uses less digits than its factorization.

57572521261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 272855762.

The product of its digits is 294000, while the sum is 43.

The spelling of 57572521261 in words is "fifty-seven billion, five hundred seventy-two million, five hundred twenty-one thousand, two hundred sixty-one".