25512974388 has 216 divisors, whose sum is σ = 75785306688. Its totient is φ = 7213536000.

The previous prime is 25512974381. The next prime is 25512974393. The reversal of 25512974388 is 88347921552.

25512974388 is a `hidden beast` number, since 2 + 5 + 512 + 9 + 7 + 43 + 88 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25512974381) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 4104603 + ... + 4110813.

Almost surely, 2^25512974388 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 25512974388, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37892653344).

25512974388 is an abundant number, since it is smaller than the sum of its proper divisors (50272332300).

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

25512974388 is a wasteful number, since it uses less digits than its factorization.

25512974388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6307 (or 6291 counting only the distinct ones).

The product of its digits is 4838400, while the sum is 54.

The spelling of 25512974388 in words is "twenty-five billion, five hundred twelve million, nine hundred seventy-four thousand, three hundred eighty-eight".