28081207850205 has 16 divisors (see below), whose sum is σ = 44930777102784. Its totient is φ = 14976362672640.

The previous prime is 28081207850173. The next prime is 28081207850207. The reversal of 28081207850205 is 50205870218082.

It is not a de Polignac number, because 28081207850205 - 2⁵ = 28081207850173 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28081207850207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16768779 + ... + 18367208.

It is an arithmetic number, because the mean of its divisors is an integer number (2808173568924).

Almost surely, 2^{28081207850205} is an apocalyptic number.

It is an amenable number.

28081207850205 is a deficient number, since it is larger than the sum of its proper divisors (16849569252579).

28081207850205 is a wasteful number, since it uses less digits than its factorization.

28081207850205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35189276.

The product of its (nonzero) digits is 716800, while the sum is 48.

The spelling of 28081207850205 in words is "twenty-eight trillion, eighty-one billion, two hundred seven million, eight hundred fifty thousand, two hundred five".