25812523128 has 128 divisors (see below), whose sum is σ = 75438604800. Its totient is φ = 7207620096.

The previous prime is 25812523123. The next prime is 25812523181. The reversal of 25812523128 is 82132521852.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25812523123) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1707250 + ... + 1722302.

It is an arithmetic number, because the mean of its divisors is an integer number (589364100).

Almost surely, 2^25812523128 is an apocalyptic number.

25812523128 is a gapful number since it is divisible by the number (28) 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 25812523128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37719302400).

25812523128 is an abundant number, since it is smaller than the sum of its proper divisors (49626081672).

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

25812523128 is a wasteful number, since it uses less digits than its factorization.

25812523128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15301 (or 15297 counting only the distinct ones).

The product of its digits is 76800, while the sum is 39.

The spelling of 25812523128 in words is "twenty-five billion, eight hundred twelve million, five hundred twenty-three thousand, one hundred twenty-eight".