25318545912 has 384 divisors, whose sum is σ = 82811289600. Its totient is φ = 6898003200.

The previous prime is 25318545911. The next prime is 25318545929. The reversal of 25318545912 is 21954581352.

25318545912 is a `hidden beast` number, since 2 + 5 + 3 + 1 + 8 + 54 + 591 + 2 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25318545911) 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 95 ways as a sum of consecutive naturals, for example, 66105673 + ... + 66106055.

It is an arithmetic number, because the mean of its divisors is an integer number (215654400).

Almost surely, 2^25318545912 is an apocalyptic number.

25318545912 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25318545912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41405644800).

25318545912 is an abundant number, since it is smaller than the sum of its proper divisors (57492743688).

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

25318545912 is a wasteful number, since it uses less digits than its factorization.

25318545912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 639 (or 632 counting only the distinct ones).

The product of its digits is 432000, while the sum is 45.

The spelling of 25318545912 in words is "twenty-five billion, three hundred eighteen million, five hundred forty-five thousand, nine hundred twelve".