25403325344 has 96 divisors (see below), whose sum is σ = 53494499520. Its totient is φ = 11853176832.

The previous prime is 25403325331. The next prime is 25403325371. The reversal of 25403325344 is 44352330452.

It is a happy number.

It is a super-2 number, since 2×25403325344² (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, 3867407 + ... + 3873969.

It is an arithmetic number, because the mean of its divisors is an integer number (557234370).

Almost surely, 2^25403325344 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 25403325344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26747249760).

25403325344 is an abundant number, since it is smaller than the sum of its proper divisors (28091174176).

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

25403325344 is a wasteful number, since it uses less digits than its factorization.

25403325344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6742 (or 6734 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 35.

Adding to 25403325344 its reverse (44352330452), we get a palindrome (69755655796).

The spelling of 25403325344 in words is "twenty-five billion, four hundred three million, three hundred twenty-five thousand, three hundred forty-four".