25530525525 has 24 divisors (see below), whose sum is σ = 42243325024. Its totient is φ = 13605681600.

The previous prime is 25530525497. The next prime is 25530525529. The reversal of 25530525525 is 52552503552.

It is not a de Polignac number, because 25530525525 - 2⁸ = 25530525269 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 (25530525529) 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, 35014 + ... + 228663.

Almost surely, 2^25530525525 is an apocalyptic number.

25530525525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25530525525 is a deficient number, since it is larger than the sum of its proper divisors (16712799499).

25530525525 is a wasteful number, since it uses less digits than its factorization.

25530525525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 264981 (or 264976 counting only the distinct ones).

The product of its (nonzero) digits is 375000, while the sum is 39.

The spelling of 25530525525 in words is "twenty-five billion, five hundred thirty million, five hundred twenty-five thousand, five hundred twenty-five".