25528025280 has 112 divisors (see below), whose sum is σ = 81375162624. Its totient is φ = 6780288000.

The previous prime is 25528025269. The next prime is 25528025291. The reversal of 25528025280 is 8252082552.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (25528025269) and next prime (25528025291).

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, 187989 + ... + 293931.

It is an arithmetic number, because the mean of its divisors is an integer number (726563952).

Almost surely, 2^25528025280 is an apocalyptic number.

25528025280 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25528025280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40687581312).

25528025280 is an abundant number, since it is smaller than the sum of its proper divisors (55847137344).

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

25528025280 is a wasteful number, since it uses less digits than its factorization.

25528025280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106214 (or 106204 counting only the distinct ones).

The product of its (nonzero) digits is 128000, while the sum is 39.

The spelling of 25528025280 in words is "twenty-five billion, five hundred twenty-eight million, twenty-five thousand, two hundred eighty".