25641176860 has 72 divisors (see below), whose sum is σ = 59883286176. Its totient is φ = 9211587840.

The previous prime is 25641176849. The next prime is 25641176867. The reversal of 25641176860 is 6867114652.

It is a self number, because there is not a number n which added to its sum of digits gives 25641176860.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25641176867) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22545 + ... + 227575.

It is an arithmetic number, because the mean of its divisors is an integer number (831712308).

Almost surely, 2^25641176860 is an apocalyptic number.

25641176860 is a gapful number since it is divisible by the number (20) 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 25641176860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29941643088).

25641176860 is an abundant number, since it is smaller than the sum of its proper divisors (34242109316).

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

25641176860 is a wasteful number, since it uses less digits than its factorization.

25641176860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205103 (or 205088 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 46.

The spelling of 25641176860 in words is "twenty-five billion, six hundred forty-one million, one hundred seventy-six thousand, eight hundred sixty".