25525580028 has 48 divisors (see below), whose sum is σ = 64224911520. Its totient is φ = 7843774464.

The previous prime is 25525580023. The next prime is 25525580029. The reversal of 25525580028 is 82008552552.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25525580023) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13576 + ... + 226352.

It is an arithmetic number, because the mean of its divisors is an integer number (1338018990).

Almost surely, 2^25525580028 is an apocalyptic number.

It is an amenable number.

25525580028 is an abundant number, since it is smaller than the sum of its proper divisors (38699331492).

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

25525580028 is a wasteful number, since it uses less digits than its factorization.

25525580028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213566 (or 213564 counting only the distinct ones).

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

The spelling of 25525580028 in words is "twenty-five billion, five hundred twenty-five million, five hundred eighty thousand, twenty-eight".