25805825250 has 32 divisors (see below), whose sum is σ = 64411341696. Its totient is φ = 6881553200.

The previous prime is 25805825209. The next prime is 25805825261. The reversal of 25805825250 is 5252850852.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17203134 + ... + 17204633.

It is an arithmetic number, because the mean of its divisors is an integer number (2012854428).

Almost surely, 2^25805825250 is an apocalyptic number.

25805825250 is an abundant number, since it is smaller than the sum of its proper divisors (38605516446).

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

25805825250 is a wasteful number, since it uses less digits than its factorization.

25805825250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34407787 (or 34407777 counting only the distinct ones).

The product of its (nonzero) digits is 320000, while the sum is 42.

The spelling of 25805825250 in words is "twenty-five billion, eight hundred five million, eight hundred twenty-five thousand, two hundred fifty".