25512535000 has 160 divisors (see below), whose sum is σ = 64959206400. Its totient is φ = 9354960000.

The previous prime is 25512534997. The next prime is 25512535007. The reversal of 25512535000 is 53521552.

It is a self number, because there is not a number n which added to its sum of digits gives 25512535000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25512535007) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 2940669 + ... + 2949331.

It is an arithmetic number, because the mean of its divisors is an integer number (405995040).

Almost surely, 2^25512535000 is an apocalyptic number.

25512535000 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 25512535000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32479603200).

25512535000 is an abundant number, since it is smaller than the sum of its proper divisors (39446671400).

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

25512535000 is a wasteful number, since it uses less digits than its factorization.

25512535000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8739 (or 8720 counting only the distinct ones).

The product of its (nonzero) digits is 7500, while the sum is 28.

The spelling of 25512535000 in words is "twenty-five billion, five hundred twelve million, five hundred thirty-five thousand".