25525505250 has 96 divisors (see below), whose sum is σ = 78881152896. Its totient is φ = 5834397600.

The previous prime is 25525505233. The next prime is 25525505311. The reversal of 25525505250 is 5250552552.

25525505250 is a `hidden beast` number, since 2 + 5 + 5 + 2 + 550 + 52 + 50 = 666.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 794584 + ... + 826083.

It is an arithmetic number, because the mean of its divisors is an integer number (821678676).

Almost surely, 2^25525505250 is an apocalyptic number.

25525505250 is an abundant number, since it is smaller than the sum of its proper divisors (53355647646).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25525505250 is a wasteful number, since it uses less digits than its factorization.

25525505250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1620697 (or 1620684 counting only the distinct ones).

The product of its (nonzero) digits is 125000, while the sum is 36.

The spelling of 25525505250 in words is "twenty-five billion, five hundred twenty-five million, five hundred five thousand, two hundred fifty".