25371298261 has 4 divisors (see below), whose sum is σ = 25372449900. Its totient is φ = 25370146624.

The previous prime is 25371298247. The next prime is 25371298283. The reversal of 25371298261 is 16289217352.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 10317480625 + 15053817636 = 101575^2 + 122694^2 .

It is a cyclic number.

It is not a de Polignac number, because 25371298261 - 2⁷ = 25371298133 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25371238261) 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, 542116 + ... + 587053.

It is an arithmetic number, because the mean of its divisors is an integer number (6343112475).

Almost surely, 2^25371298261 is an apocalyptic number.

It is an amenable number.

25371298261 is a deficient number, since it is larger than the sum of its proper divisors (1151639).

25371298261 is a wasteful number, since it uses less digits than its factorization.

25371298261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1151638.

The product of its digits is 362880, while the sum is 46.

The spelling of 25371298261 in words is "twenty-five billion, three hundred seventy-one million, two hundred ninety-eight thousand, two hundred sixty-one".