25898794992 has 120 divisors (see below), whose sum is σ = 83883837440. Its totient is φ = 7305966720.

The previous prime is 25898794981. The next prime is 25898794997. The reversal of 25898794992 is 29949789852.

25898794992 is a `hidden beast` number, since 2 + 58 + 9 + 87 + 9 + 499 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a self number, because there is not a number n which added to its sum of digits gives 25898794992.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25898794997) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 82984 + ... + 242247.

Almost surely, 2^25898794992 is an apocalyptic number.

It is an amenable number.

25898794992 is an abundant number, since it is smaller than the sum of its proper divisors (57985042448).

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

25898794992 is a wasteful number, since it uses less digits than its factorization.

25898794992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 325331 (or 325322 counting only the distinct ones).

The product of its digits is 235146240, while the sum is 72.

The spelling of 25898794992 in words is "twenty-five billion, eight hundred ninety-eight million, seven hundred ninety-four thousand, nine hundred ninety-two".