25543251312 has 160 divisors (see below), whose sum is σ = 72895334400. Its totient is φ = 7671350016.

The previous prime is 25543251299. The next prime is 25543251323. The reversal of 25543251312 is 21315234552.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3751303 + ... + 3758105.

It is an arithmetic number, because the mean of its divisors is an integer number (455595840).

Almost surely, 2^25543251312 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 25543251312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36447667200).

25543251312 is an abundant number, since it is smaller than the sum of its proper divisors (47352083088).

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

25543251312 is a wasteful number, since it uses less digits than its factorization.

25543251312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7035 (or 7029 counting only the distinct ones).

The product of its digits is 36000, while the sum is 33.

Adding to 25543251312 its reverse (21315234552), we get a palindrome (46858485864).

The spelling of 25543251312 in words is "twenty-five billion, five hundred forty-three million, two hundred fifty-one thousand, three hundred twelve".