25231657312 has 48 divisors (see below), whose sum is σ = 52743791520. Its totient is φ = 11840555008.

The previous prime is 25231657307. The next prime is 25231657313. The reversal of 25231657312 is 21375613252.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25231657313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 130698 + ... + 259894.

It is an arithmetic number, because the mean of its divisors is an integer number (1098828990).

Almost surely, 2^25231657312 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 25231657312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26371895760).

25231657312 is an abundant number, since it is smaller than the sum of its proper divisors (27512134208).

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

25231657312 is a wasteful number, since it uses less digits than its factorization.

25231657312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129583 (or 129575 counting only the distinct ones).

The product of its digits is 75600, while the sum is 37.

The spelling of 25231657312 in words is "twenty-five billion, two hundred thirty-one million, six hundred fifty-seven thousand, three hundred twelve".