25539250025 has 96 divisors (see below), whose sum is σ = 36367958016. Its totient is φ = 17677440000.

The previous prime is 25539250019. The next prime is 25539250027. The reversal of 25539250025 is 52005293552.

It is not a de Polignac number, because 25539250025 - 2²⁰ = 25538201449 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25539250027) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 82119620 + ... + 82119930.

It is an arithmetic number, because the mean of its divisors is an integer number (378832896).

Almost surely, 2^25539250025 is an apocalyptic number.

25539250025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25539250025 is a deficient number, since it is larger than the sum of its proper divisors (10828707991).

25539250025 is a wasteful number, since it uses less digits than its factorization.

25539250025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 663 (or 658 counting only the distinct ones).

The product of its (nonzero) digits is 135000, while the sum is 38.

The spelling of 25539250025 in words is "twenty-five billion, five hundred thirty-nine million, two hundred fifty thousand, twenty-five".