25900813568 has 144 divisors (see below), whose sum is σ = 60525292800. Its totient is φ = 11057485824.

The previous prime is 25900813559. The next prime is 25900813571. The reversal of 25900813568 is 86531800952.

It is a congruent number.

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, 34859405 + ... + 34860147.

Almost surely, 2^25900813568 is an apocalyptic number.

25900813568 is a gapful number since it is divisible by the number (28) 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 25900813568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30262646400).

25900813568 is an abundant number, since it is smaller than the sum of its proper divisors (34624479232).

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

25900813568 is an frugal number, since it uses more digits than its factorization.

25900813568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1177 (or 1149 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 47.

The spelling of 25900813568 in words is "twenty-five billion, nine hundred million, eight hundred thirteen thousand, five hundred sixty-eight".