57128515161 has 4 divisors (see below), whose sum is σ = 76171353552. Its totient is φ = 38085676772.

The previous prime is 57128515141. The next prime is 57128515187. The reversal of 57128515161 is 16151582175.

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 57128515161 - 2⁷ = 57128515033 is a prime.

It is not an unprimeable number, because it can be changed into a prime (57128515121) 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, 9521419191 + ... + 9521419196.

It is an arithmetic number, because the mean of its divisors is an integer number (19042838388).

Almost surely, 2^57128515161 is an apocalyptic number.

It is an amenable number.

57128515161 is a deficient number, since it is larger than the sum of its proper divisors (19042838391).

57128515161 is a wasteful number, since it uses less digits than its factorization.

57128515161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19042838390.

The product of its digits is 84000, while the sum is 42.

The spelling of 57128515161 in words is "fifty-seven billion, one hundred twenty-eight million, five hundred fifteen thousand, one hundred sixty-one".