25312135888 has 120 divisors (see below), whose sum is σ = 56283194520. Its totient is φ = 11003166720.

The previous prime is 25312135817. The next prime is 25312135931. The reversal of 25312135888 is 88853121352.

It can be written as a sum of positive squares in 12 ways, for example, as 24183982144 + 1128153744 = 155512^2 + 33588^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3211120 + ... + 3218992.

It is an arithmetic number, because the mean of its divisors is an integer number (469026621).

Almost surely, 2^25312135888 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 25312135888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28141597260).

25312135888 is an abundant number, since it is smaller than the sum of its proper divisors (30971058632).

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

25312135888 is a wasteful number, since it uses less digits than its factorization.

25312135888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7977 (or 7958 counting only the distinct ones).

The product of its digits is 460800, while the sum is 46.

The spelling of 25312135888 in words is "twenty-five billion, three hundred twelve million, one hundred thirty-five thousand, eight hundred eighty-eight".