25135225424 has 80 divisors (see below), whose sum is σ = 53953153920. Its totient is φ = 11283148800.

The previous prime is 25135225397. The next prime is 25135225499. The reversal of 25135225424 is 42452253152.

It is a happy number.

It is a congruent number.

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, 2365724 + ... + 2376324.

It is an arithmetic number, because the mean of its divisors is an integer number (674414424).

Almost surely, 2^25135225424 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 25135225424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26976576960).

25135225424 is an abundant number, since it is smaller than the sum of its proper divisors (28817928496).

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

25135225424 is a wasteful number, since it uses less digits than its factorization.

25135225424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11028 (or 11022 counting only the distinct ones).

The product of its digits is 96000, while the sum is 35.

Adding to 25135225424 its reverse (42452253152), we get a palindrome (67587478576).

The spelling of 25135225424 in words is "twenty-five billion, one hundred thirty-five million, two hundred twenty-five thousand, four hundred twenty-four".