25871712256 has 68 divisors (see below), whose sum is σ = 55725097792. Its totient is φ = 11940397056.

The previous prime is 25871712151. The next prime is 25871712289. The reversal of 25871712256 is 65221717852.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 836785 + ... + 867151.

Almost surely, 2^25871712256 is an apocalyptic number.

25871712256 is a gapful number since it is divisible by the number (26) 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 25871712256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27862548896).

25871712256 is an abundant number, since it is smaller than the sum of its proper divisors (29853385536).

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

25871712256 is an frugal number, since it uses more digits than its factorization.

25871712256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30412 (or 30382 counting only the distinct ones).

The product of its digits is 470400, while the sum is 46.

The spelling of 25871712256 in words is "twenty-five billion, eight hundred seventy-one million, seven hundred twelve thousand, two hundred fifty-six".