25252505808 has 40 divisors (see below), whose sum is σ = 65263197888. Its totient is φ = 8413946112.

The previous prime is 25252505783. The next prime is 25252505849. The reversal of 25252505808 is 80850525252.

It is a self number, because there is not a number n which added to its sum of digits gives 25252505808.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4941 + ... + 224787.

Almost surely, 2^25252505808 is an apocalyptic number.

It is an amenable number.

25252505808 is an abundant number, since it is smaller than the sum of its proper divisors (40010692080).

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

25252505808 is a wasteful number, since it uses less digits than its factorization.

25252505808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222251 (or 222245 counting only the distinct ones).

The product of its (nonzero) digits is 320000, while the sum is 42.

The spelling of 25252505808 in words is "twenty-five billion, two hundred fifty-two million, five hundred five thousand, eight hundred eight".