25552805500 has 96 divisors (see below), whose sum is σ = 58893307200. Its totient is φ = 9658656000.

The previous prime is 25552805483. The next prime is 25552805527. The reversal of 25552805500 is 550825552.

It is a self number, because there is not a number n which added to its sum of digits gives 25552805500.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3996306 + ... + 4002694.

It is an arithmetic number, because the mean of its divisors is an integer number (613471950).

Almost surely, 2^25552805500 is an apocalyptic number.

25552805500 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 25552805500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29446653600).

25552805500 is an abundant number, since it is smaller than the sum of its proper divisors (33340501700).

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

25552805500 is a wasteful number, since it uses less digits than its factorization.

25552805500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6848 (or 6836 counting only the distinct ones).

The product of its (nonzero) digits is 100000, while the sum is 37.

The spelling of 25552805500 in words is "twenty-five billion, five hundred fifty-two million, eight hundred five thousand, five hundred".