25116588864 has 336 divisors, whose sum is σ = 78461859840. Its totient is φ = 7955781120.

The previous prime is 25116588839. The next prime is 25116588929. The reversal of 25116588864 is 46888561152.

25116588864 is a `hidden beast` number, since 2 + 51 + 1 + 6 + 588 + 8 + 6 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 25116588864.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 28444167 + ... + 28445049.

It is an arithmetic number, because the mean of its divisors is an integer number (233517440).

Almost surely, 2^25116588864 is an apocalyptic number.

25116588864 is a gapful number since it is divisible by the number (24) 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 25116588864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39230929920).

25116588864 is an abundant number, since it is smaller than the sum of its proper divisors (53345270976).

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

25116588864 is an equidigital number, since it uses as much as digits as its factorization.

25116588864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1000 (or 978 counting only the distinct ones).

The product of its digits is 3686400, while the sum is 54.

The spelling of 25116588864 in words is "twenty-five billion, one hundred sixteen million, five hundred eighty-eight thousand, eight hundred sixty-four".