16868717185 has 12 divisors (see below), whose sum is σ = 20282382972. Its totient is φ = 13468379648.

The previous prime is 16868717171. The next prime is 16868717189. The reversal of 16868717185 is 58171786861.

16868717185 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 6 ways, for example, as 924099201 + 15944617984 = 30399^2 + 126272^2 .

It is not a de Polignac number, because 16868717185 - 2⁵ = 16868717153 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16868717189) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7420209 + ... + 7422481.

It is an arithmetic number, because the mean of its divisors is an integer number (1690198581).

Almost surely, 2^16868717185 is an apocalyptic number.

It is an amenable number.

16868717185 is a deficient number, since it is larger than the sum of its proper divisors (3413665787).

16868717185 is an frugal number, since it uses more digits than its factorization.

16868717185 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5204 (or 2931 counting only the distinct ones).

The product of its digits is 4515840, while the sum is 58.

The spelling of 16868717185 in words is "sixteen billion, eight hundred sixty-eight million, seven hundred seventeen thousand, one hundred eighty-five".