25800257805 has 32 divisors (see below), whose sum is σ = 48452692224. Its totient is φ = 11475634176.

The previous prime is 25800257773. The next prime is 25800257807. The reversal of 25800257805 is 50875200852.

It is not a de Polignac number, because 25800257805 - 2⁵ = 25800257773 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25800257807) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 3316612 + ... + 3324381.

It is an arithmetic number, because the mean of its divisors is an integer number (1514146632).

Almost surely, 2^25800257805 is an apocalyptic number.

It is an amenable number.

25800257805 is a deficient number, since it is larger than the sum of its proper divisors (22652434419).

25800257805 is a wasteful number, since it uses less digits than its factorization.

25800257805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6641045.

The product of its (nonzero) digits is 224000, while the sum is 42.

The spelling of 25800257805 in words is "twenty-five billion, eight hundred million, two hundred fifty-seven thousand, eight hundred five".