25525000528 has 20 divisors (see below), whose sum is σ = 51160023540. Its totient is φ = 12322413824.

The previous prime is 25525000471. The next prime is 25525000537. The reversal of 25525000528 is 82500052552.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 12181978384 + 13343022144 = 110372^2 + 115512^2 .

It is a junction number, because it is equal to n+sod(n) for n = 25525000493 and 25525000502.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27504925 + ... + 27505852.

It is an arithmetic number, because the mean of its divisors is an integer number (2558001177).

Almost surely, 2^25525000528 is an apocalyptic number.

It is an amenable number.

25525000528 is an abundant number, since it is smaller than the sum of its proper divisors (25635023012).

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

25525000528 is a wasteful number, since it uses less digits than its factorization.

25525000528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55010814 (or 55010808 counting only the distinct ones).

The product of its (nonzero) digits is 40000, while the sum is 34.

The spelling of 25525000528 in words is "twenty-five billion, five hundred twenty-five million, five hundred twenty-eight", and thus it is an aban number.