2525757891 has 16 divisors (see below), whose sum is σ = 3561105408. Its totient is φ = 1589774400.

The previous prime is 2525757889. The next prime is 2525757917. The reversal of 2525757891 is 1987575252.

It is not a de Polignac number, because 2525757891 - 2¹ = 2525757889 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2525757821) 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, 327391 + ... + 335016.

It is an arithmetic number, because the mean of its divisors is an integer number (222569088).

Almost surely, 2^2525757891 is an apocalyptic number.

2525757891 is a deficient number, since it is larger than the sum of its proper divisors (1035347517).

2525757891 is a wasteful number, since it uses less digits than its factorization.

2525757891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 662482.

The product of its digits is 1764000, while the sum is 51.

The square root of 2525757891 is about 50256.9188371114. The cubic root of 2525757891 is about 1361.8540692276.

The spelling of 2525757891 in words is "two billion, five hundred twenty-five million, seven hundred fifty-seven thousand, eight hundred ninety-one".