25097264161 has 4 divisors (see below), whose sum is σ = 25124574400. Its totient is φ = 25069953924.

The previous prime is 25097264149. The next prime is 25097264183. The reversal of 25097264161 is 16146279052.

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 25097264161 - 2⁹ = 25097263649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25097264111) 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, 13653741 + ... + 13655578.

It is an arithmetic number, because the mean of its divisors is an integer number (6281143600).

Almost surely, 2^25097264161 is an apocalyptic number.

It is an amenable number.

25097264161 is a deficient number, since it is larger than the sum of its proper divisors (27310239).

25097264161 is an equidigital number, since it uses as much as digits as its factorization.

25097264161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27310238.

The product of its (nonzero) digits is 181440, while the sum is 43.

The spelling of 25097264161 in words is "twenty-five billion, ninety-seven million, two hundred sixty-four thousand, one hundred sixty-one".