25320385344 has 224 divisors, whose sum is σ = 75756211200. Its totient is φ = 7421460480.

The previous prime is 25320385331. The next prime is 25320385381. The reversal of 25320385344 is 44358302352.

It is a super-2 number, since 2×25320385344² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2930022 + ... + 2938650.

Almost surely, 2^25320385344 is an apocalyptic number.

25320385344 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 25320385344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37878105600).

25320385344 is an abundant number, since it is smaller than the sum of its proper divisors (50435825856).

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

25320385344 is a wasteful number, since it uses less digits than its factorization.

25320385344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8721 (or 8711 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 39.

Adding to 25320385344 its reverse (44358302352), we get a palindrome (69678687696).

The spelling of 25320385344 in words is "twenty-five billion, three hundred twenty million, three hundred eighty-five thousand, three hundred forty-four".