25005555528 has 32 divisors (see below), whose sum is σ = 62794233600. Its totient is φ = 8297805888.

The previous prime is 25005555517. The next prime is 25005555557. The reversal of 25005555528 is 82555550052.

It is a self number, because there is not a number n which added to its sum of digits gives 25005555528.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2330743 + ... + 2341446.

It is an arithmetic number, because the mean of its divisors is an integer number (1962319800).

Almost surely, 2^25005555528 is an apocalyptic number.

It is an amenable number.

25005555528 is an abundant number, since it is smaller than the sum of its proper divisors (37788678072).

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

25005555528 is a wasteful number, since it uses less digits than its factorization.

25005555528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4672421 (or 4672417 counting only the distinct ones).

The product of its (nonzero) digits is 500000, while the sum is 42.

The spelling of 25005555528 in words is "twenty-five billion, five million, five hundred fifty-five thousand, five hundred twenty-eight".