25881111000 has 384 divisors, whose sum is σ = 89799840000. Its totient is φ = 6721228800.

The previous prime is 25881110999. The next prime is 25881111001. The reversal of 25881111000 is 11118852.

It is an interprime number because it is at equal distance from previous prime (25881110999) and next prime (25881111001).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25881111001) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 63278796 + ... + 63279204.

It is an arithmetic number, because the mean of its divisors is an integer number (233853750).

Almost surely, 2^25881111000 is an apocalyptic number.

25881111000 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 25881111000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44899920000).

25881111000 is an abundant number, since it is smaller than the sum of its proper divisors (63918729000).

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

25881111000 is a wasteful number, since it uses less digits than its factorization.

25881111000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 604 (or 587 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 27.

Adding to 25881111000 its reverse (11118852), we get a palindrome (25892229852).

The spelling of 25881111000 in words is "twenty-five billion, eight hundred eighty-one million, one hundred eleven thousand".