25989645422500 has 120 divisors (see below), whose sum is σ = 56971531774080. Its totient is φ = 10370755296000.

The previous prime is 25989645422491. The next prime is 25989645422527. The reversal of 25989645422500 is 522454698952.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 2536312377 + ... + 2536322623.

It is an arithmetic number, because the mean of its divisors is an integer number (474762764784).

Almost surely, 2^{25989645422500} is an apocalyptic number.

25989645422500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25989645422500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28485765887040).

25989645422500 is an abundant number, since it is smaller than the sum of its proper divisors (30981886351580).

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

25989645422500 is a wasteful number, since it uses less digits than its factorization.

25989645422500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12623 (or 12606 counting only the distinct ones).

The product of its (nonzero) digits is 62208000, while the sum is 61.

The spelling of 25989645422500 in words is "twenty-five trillion, nine hundred eighty-nine billion, six hundred forty-five million, four hundred twenty-two thousand, five hundred".