25899231852 has 144 divisors (see below), whose sum is σ = 73272326400. Its totient is φ = 7659532800.

The previous prime is 25899231847. The next prime is 25899231871. The reversal of 25899231852 is 25813299852.

It is a happy number.

25899231852 is a `hidden beast` number, since 2 + 589 + 9 + 2 + 3 + 1 + 8 + 52 = 666.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 2155702 + ... + 2167682.

It is an arithmetic number, because the mean of its divisors is an integer number (508835600).

Almost surely, 2^25899231852 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 25899231852, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36636163200).

25899231852 is an abundant number, since it is smaller than the sum of its proper divisors (47373094548).

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

25899231852 is a wasteful number, since it uses less digits than its factorization.

25899231852 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12184 (or 12179 counting only the distinct ones).

The product of its digits is 3110400, while the sum is 54.

The spelling of 25899231852 in words is "twenty-five billion, eight hundred ninety-nine million, two hundred thirty-one thousand, eight hundred fifty-two".