25861632210 has 112 divisors (see below), whose sum is σ = 69958776600. Its totient is φ = 6880204800.

The previous prime is 25861632187. The next prime is 25861632217. The reversal of 25861632210 is 1223616852.

25861632210 is a `hidden beast` number, since 2 + 5 + 8 + 6 + 1 + 632 + 2 + 10 = 666.

25861632210 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 23428281969 + 2433350241 = 153063^2 + 49329^2 .

It is not an unprimeable number, because it can be changed into a prime (25861632217) by changing a digit.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 3269260 + ... + 3277160.

Almost surely, 2^25861632210 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25861632210, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34979388300).

25861632210 is an abundant number, since it is smaller than the sum of its proper divisors (44097144390).

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

25861632210 is an equidigital number, since it uses as much as digits as its factorization.

25861632210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8375 (or 8360 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The spelling of 25861632210 in words is "twenty-five billion, eight hundred sixty-one million, six hundred thirty-two thousand, two hundred ten".