25525434168 has 144 divisors (see below), whose sum is σ = 76452685920. Its totient is φ = 7686701568.

The previous prime is 25525434167. The next prime is 25525434169. The reversal of 25525434168 is 86143452552.

25525434168 is a `hidden beast` number, since 2 + 5 + 5 + 2 + 543 + 41 + 68 = 666.

It is an interprime number because it is at equal distance from previous prime (25525434167) and next prime (25525434169).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25525434167) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 549580 + ... + 594212.

It is an arithmetic number, because the mean of its divisors is an integer number (530921430).

Almost surely, 2^25525434168 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 25525434168, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38226342960).

25525434168 is an abundant number, since it is smaller than the sum of its proper divisors (50927251752).

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

25525434168 is a wasteful number, since it uses less digits than its factorization.

25525434168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44718 (or 44698 counting only the distinct ones).

The product of its digits is 1152000, while the sum is 45.

The spelling of 25525434168 in words is "twenty-five billion, five hundred twenty-five million, four hundred thirty-four thousand, one hundred sixty-eight".