25807493992 has 64 divisors (see below), whose sum is σ = 56554416000. Its totient is φ = 10812061440.

The previous prime is 25807493989. The next prime is 25807494007. The reversal of 25807493992 is 29939470852.

It is a super-2 number, since 2×25807493992² (a number of 22 digits) contains 22 as substring.

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, 533634 + ... + 579982.

It is an arithmetic number, because the mean of its divisors is an integer number (883662750).

Almost surely, 2^25807493992 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25807493992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28277208000).

25807493992 is an abundant number, since it is smaller than the sum of its proper divisors (30746922008).

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

25807493992 is a wasteful number, since it uses less digits than its factorization.

25807493992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46586 (or 46582 counting only the distinct ones).

The product of its (nonzero) digits is 9797760, while the sum is 58.

The spelling of 25807493992 in words is "twenty-five billion, eight hundred seven million, four hundred ninety-three thousand, nine hundred ninety-two".