25990109928 has 32 divisors (see below), whose sum is σ = 72194750400. Its totient is φ = 8663369904.

The previous prime is 25990109891. The next prime is 25990109939. The reversal of 25990109928 is 82990109952.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60162076 + ... + 60162507.

It is an arithmetic number, because the mean of its divisors is an integer number (2256085950).

Almost surely, 2^25990109928 is an apocalyptic number.

It is an amenable number.

25990109928 is an abundant number, since it is smaller than the sum of its proper divisors (46204640472).

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

25990109928 is a wasteful number, since it uses less digits than its factorization.

25990109928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120324598 (or 120324588 counting only the distinct ones).

The product of its (nonzero) digits is 1049760, while the sum is 54.

The spelling of 25990109928 in words is "twenty-five billion, nine hundred ninety million, one hundred nine thousand, nine hundred twenty-eight".