25111000000 has 98 divisors (see below), whose sum is σ = 62288733944. Its totient is φ = 10044000000.

The previous prime is 25110999959. The next prime is 25111000073. The reversal of 25111000000 is 11152.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a congruent number.

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 13 ways as a sum of consecutive naturals, for example, 987445 + ... + 1012555.

Almost surely, 2^25111000000 is an apocalyptic number.

25111000000 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 25111000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31144366972).

25111000000 is an abundant number, since it is smaller than the sum of its proper divisors (37177733944).

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

25111000000 is an frugal number, since it uses more digits than its factorization.

25111000000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25153 (or 25118 counting only the distinct ones).

The product of its (nonzero) digits is 10, while the sum is 10.

Adding to 25111000000 its reverse (11152), we get a palindrome (25111011152).

The spelling of 25111000000 in words is "twenty-five billion, one hundred eleven million", and thus it is an aban number.