25287717168 has 120 divisors (see below), whose sum is σ = 80974603008. Its totient is φ = 7216661376.

The previous prime is 25287717089. The next prime is 25287717173. The reversal of 25287717168 is 86171778252.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 879955 + ... + 908237.

Almost surely, 2^25287717168 is an apocalyptic number.

25287717168 is a gapful number since it is divisible by the number (28) 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 25287717168, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40487301504).

25287717168 is an abundant number, since it is smaller than the sum of its proper divisors (55686885840).

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

25287717168 is a wasteful number, since it uses less digits than its factorization.

25287717168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29191 (or 29182 counting only the distinct ones).

The product of its digits is 2634240, while the sum is 54.

The spelling of 25287717168 in words is "twenty-five billion, two hundred eighty-seven million, seven hundred seventeen thousand, one hundred sixty-eight".