25525525250 has 32 divisors (see below), whose sum is σ = 48104550000. Its totient is φ = 10141670400.

The previous prime is 25525525247. The next prime is 25525525307. The reversal of 25525525250 is 5252552552.

It can be written as a sum of positive squares in 8 ways, for example, as 1846163089 + 23679362161 = 42967^2 + 153881^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 305375 + ... + 379874.

Almost surely, 2^25525525250 is an apocalyptic number.

25525525250 is a deficient number, since it is larger than the sum of its proper divisors (22579024750).

25525525250 is a wasteful number, since it uses less digits than its factorization.

25525525250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 685415 (or 685405 counting only the distinct ones).

The product of its (nonzero) digits is 250000, while the sum is 38.

The spelling of 25525525250 in words is "twenty-five billion, five hundred twenty-five million, five hundred twenty-five thousand, two hundred fifty".