25696869225 has 12 divisors (see below), whose sum is σ = 42485490576. Its totient is φ = 13704996880.

The previous prime is 25696869221. The next prime is 25696869227. The reversal of 25696869225 is 52296869652.

It is not a de Polignac number, because 25696869225 - 2² = 25696869221 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25696869221) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 171312387 + ... + 171312536.

It is an arithmetic number, because the mean of its divisors is an integer number (3540457548).

Almost surely, 2^25696869225 is an apocalyptic number.

25696869225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25696869225 is a deficient number, since it is larger than the sum of its proper divisors (16788621351).

25696869225 is a wasteful number, since it uses less digits than its factorization.

25696869225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 342624936 (or 342624931 counting only the distinct ones).

The product of its digits is 27993600, while the sum is 60.

The spelling of 25696869225 in words is "twenty-five billion, six hundred ninety-six million, eight hundred sixty-nine thousand, two hundred twenty-five".