25901899320 has 64 divisors (see below), whose sum is σ = 84769856640. Its totient is φ = 6279248000.

The previous prime is 25901899291. The next prime is 25901899339. The reversal of 25901899320 is 2399810952.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 25901899320.

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, 9810006 + ... + 9812645.

It is an arithmetic number, because the mean of its divisors is an integer number (1324529010).

Almost surely, 2^25901899320 is an apocalyptic number.

25901899320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25901899320 is an abundant number, since it is smaller than the sum of its proper divisors (58867957320).

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

25901899320 is a wasteful number, since it uses less digits than its factorization.

25901899320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19622676 (or 19622672 counting only the distinct ones).

The product of its (nonzero) digits is 349920, while the sum is 48.

The spelling of 25901899320 in words is "twenty-five billion, nine hundred one million, eight hundred ninety-nine thousand, three hundred twenty".