2572137891 has 6 divisors (see below), whose sum is σ = 3715310300. Its totient is φ = 1714758588.

The previous prime is 2572137857. The next prime is 2572137937. The reversal of 2572137891 is 1987312752.

2572137891 is a `hidden beast` number, since 2 + 572 + 1 + 3 + 78 + 9 + 1 = 666.

It is not a de Polignac number, because 2572137891 - 2¹¹ = 2572135843 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2572177891) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 142896541 + ... + 142896558.

Almost surely, 2^2572137891 is an apocalyptic number.

2572137891 is a deficient number, since it is larger than the sum of its proper divisors (1143172409).

2572137891 is a wasteful number, since it uses less digits than its factorization.

2572137891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285793105 (or 285793102 counting only the distinct ones).

The product of its digits is 211680, while the sum is 45.

The square root of 2572137891 is about 50716.2487867547. The cubic root of 2572137891 is about 1370.1393807435.

The spelling of 2572137891 in words is "two billion, five hundred seventy-two million, one hundred thirty-seven thousand, eight hundred ninety-one".