25996129236 has 144 divisors (see below), whose sum is σ = 82255799808. Its totient is φ = 6725160000.

The previous prime is 25996129231. The next prime is 25996129261. The reversal of 25996129236 is 63292169952.

It is a happy number.

25996129236 is a `hidden beast` number, since 2 + 599 + 6 + 1 + 29 + 23 + 6 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25996129231) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 677091 + ... + 714453.

It is an arithmetic number, because the mean of its divisors is an integer number (571220832).

Almost surely, 2^25996129236 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 25996129236, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41127899904).

25996129236 is an abundant number, since it is smaller than the sum of its proper divisors (56259670572).

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

25996129236 is a wasteful number, since it uses less digits than its factorization.

25996129236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37642 (or 37637 counting only the distinct ones).

The product of its digits is 3149280, while the sum is 54.

The spelling of 25996129236 in words is "twenty-five billion, nine hundred ninety-six million, one hundred twenty-nine thousand, two hundred thirty-six".