25580855850 has 48 divisors (see below), whose sum is σ = 69207847200. Its totient is φ = 6201419200.

The previous prime is 25580855849. The next prime is 25580855917. The reversal of 25580855850 is 5855808552.

It is a junction number, because it is equal to n+sod(n) for n = 25580855793 and 25580855802.

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 23 ways as a sum of consecutive naturals, for example, 7750125 + ... + 7753424.

It is an arithmetic number, because the mean of its divisors is an integer number (1441830150).

Almost surely, 2^25580855850 is an apocalyptic number.

25580855850 is an abundant number, since it is smaller than the sum of its proper divisors (43626991350).

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

25580855850 is a wasteful number, since it uses less digits than its factorization.

25580855850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15503575 (or 15503570 counting only the distinct ones).

The product of its (nonzero) digits is 3200000, while the sum is 51.

The spelling of 25580855850 in words is "twenty-five billion, five hundred eighty million, eight hundred fifty-five thousand, eight hundred fifty".