25163534864 has 60 divisors (see below), whose sum is σ = 53537144832. Its totient is φ = 11450275200.

The previous prime is 25163534857. The next prime is 25163534867. The reversal of 25163534864 is 46843536152.

It is not an unprimeable number, because it can be changed into a prime (25163534867) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 126449 + ... + 257519.

Almost surely, 2^25163534864 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 25163534864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26768572416).

25163534864 is an abundant number, since it is smaller than the sum of its proper divisors (28373609968).

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

25163534864 is a wasteful number, since it uses less digits than its factorization.

25163534864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131176 (or 131157 counting only the distinct ones).

The product of its digits is 2073600, while the sum is 47.

The spelling of 25163534864 in words is "twenty-five billion, one hundred sixty-three million, five hundred thirty-four thousand, eight hundred sixty-four".