25887247488 has 320 divisors, whose sum is σ = 82102192920. Its totient is φ = 8068792320.

The previous prime is 25887247427. The next prime is 25887247489. The reversal of 25887247488 is 88474278852.

25887247488 is a `hidden beast` number, since 2 + 5 + 8 + 87 + 2 + 474 + 88 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 13925888064 + 11961359424 = 118008^2 + 109368^2 .

It is not an unprimeable number, because it can be changed into a prime (25887247489) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 34017028 + ... + 34017788.

Almost surely, 2^25887247488 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 25887247488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41051096460).

25887247488 is an abundant number, since it is smaller than the sum of its proper divisors (56214945432).

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

25887247488 is a wasteful number, since it uses less digits than its factorization.

25887247488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 997 (or 976 counting only the distinct ones).

The product of its digits is 64225280, while the sum is 63.

The spelling of 25887247488 in words is "twenty-five billion, eight hundred eighty-seven million, two hundred forty-seven thousand, four hundred eighty-eight".