25890120408 has 32 divisors (see below), whose sum is σ = 66474635760. Its totient is φ = 8396795520.

The previous prime is 25890120367. The next prime is 25890120419. The reversal of 25890120408 is 80402109852.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14576883 + ... + 14578658.

Almost surely, 2^25890120408 is an apocalyptic number.

It is an amenable number.

25890120408 is an abundant number, since it is smaller than the sum of its proper divisors (40584515352).

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

25890120408 is a wasteful number, since it uses less digits than its factorization.

25890120408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29155587 (or 29155583 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 39.

The spelling of 25890120408 in words is "twenty-five billion, eight hundred ninety million, one hundred twenty thousand, four hundred eight".