57431172509 has 4 divisors (see below), whose sum is σ = 58766781216. Its totient is φ = 56095563804.

The previous prime is 57431172499. The next prime is 57431172521. The reversal of 57431172509 is 90527113475.

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 a de Polignac number, because none of the positive numbers 2^k-57431172509 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 57431172509.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57431172559) 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, 667804289 + ... + 667804374.

It is an arithmetic number, because the mean of its divisors is an integer number (14691695304).

Almost surely, 2^57431172509 is an apocalyptic number.

It is an amenable number.

57431172509 is a deficient number, since it is larger than the sum of its proper divisors (1335608707).

57431172509 is a wasteful number, since it uses less digits than its factorization.

57431172509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1335608706.

The product of its (nonzero) digits is 264600, while the sum is 44.

The spelling of 57431172509 in words is "fifty-seven billion, four hundred thirty-one million, one hundred seventy-two thousand, five hundred nine".