57204121557 has 16 divisors (see below), whose sum is σ = 85235411520. Its totient is φ = 33823574400.

The previous prime is 57204121549. The next prime is 57204121561. The reversal of 57204121557 is 75512140275.

It is not a de Polignac number, because 57204121557 - 2³ = 57204121549 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57204121567) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21138382 + ... + 21141087.

It is an arithmetic number, because the mean of its divisors is an integer number (5327213220).

Almost surely, 2^57204121557 is an apocalyptic number.

It is an amenable number.

57204121557 is a deficient number, since it is larger than the sum of its proper divisors (28031289963).

57204121557 is a wasteful number, since it uses less digits than its factorization.

57204121557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42279524.

The product of its (nonzero) digits is 98000, while the sum is 39.

The spelling of 57204121557 in words is "fifty-seven billion, two hundred four million, one hundred twenty-one thousand, five hundred fifty-seven".