25025545728 has 320 divisors, whose sum is σ = 76720089600. Its totient is φ = 8049991680.

The previous prime is 25025545703. The next prime is 25025545747. The reversal of 25025545728 is 82754552052.

25025545728 is a `hidden beast` number, since 2 + 5 + 0 + 25 + 54 + 572 + 8 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 49752325 + ... + 49752827.

It is an arithmetic number, because the mean of its divisors is an integer number (239750280).

Almost surely, 2^25025545728 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25025545728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38360044800).

25025545728 is an abundant number, since it is smaller than the sum of its proper divisors (51694543872).

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

25025545728 is an equidigital number, since it uses as much as digits as its factorization.

25025545728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 650 (or 628 counting only the distinct ones).

The product of its (nonzero) digits is 1120000, while the sum is 45.

The spelling of 25025545728 in words is "twenty-five billion, twenty-five million, five hundred forty-five thousand, seven hundred twenty-eight".