25657250025 has 24 divisors (see below), whose sum is σ = 46276350624. Its totient is φ = 12439878400.

The previous prime is 25657250023. The next prime is 25657250029. The reversal of 25657250025 is 52005275652.

It is not a de Polignac number, because 25657250025 - 2¹ = 25657250023 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25657250023) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15549024 + ... + 15550673.

It is an arithmetic number, because the mean of its divisors is an integer number (1928181276).

Almost surely, 2^25657250025 is an apocalyptic number.

25657250025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25657250025 is a deficient number, since it is larger than the sum of its proper divisors (20619100599).

25657250025 is a wasteful number, since it uses less digits than its factorization.

25657250025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31099721 (or 31099716 counting only the distinct ones).

The product of its (nonzero) digits is 210000, while the sum is 39.

The spelling of 25657250025 in words is "twenty-five billion, six hundred fifty-seven million, two hundred fifty thousand, twenty-five".