25107998992 has 20 divisors (see below), whose sum is σ = 48652139536. Its totient is φ = 12552608160.

The previous prime is 25107998957. The next prime is 25107998999. The reversal of 25107998992 is 29989970152.

It is a super-2 number, since 2×25107998992² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 25107998992.

It is not an unprimeable number, because it can be changed into a prime (25107998999) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70567 + ... + 234937.

Almost surely, 2^25107998992 is an apocalyptic number.

It is an amenable number.

25107998992 is a deficient number, since it is larger than the sum of its proper divisors (23544140544).

25107998992 is a wasteful number, since it uses less digits than its factorization.

25107998992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173926 (or 173920 counting only the distinct ones).

The product of its (nonzero) digits is 7348320, while the sum is 61.

The spelling of 25107998992 in words is "twenty-five billion, one hundred seven million, nine hundred ninety-eight thousand, nine hundred ninety-two".