16851787000189 has 2 divisors, whose sum is σ = 16851787000190. Its totient is φ = 16851787000188.

The previous prime is 16851787000187. The next prime is 16851787000229. The reversal of 16851787000189 is 98100078715861.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16342372204900 + 509414795289 = 4042570^2 + 713733^2 .

It is an emirp because it is prime and its reverse (98100078715861) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16851787000189 - 2¹ = 16851787000187 is a prime.

It is a super-3 number, since 3×16851787000189³ (a number of 41 digits) contains 333 as substring.

Together with 16851787000187, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16851787000187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8425893500094 + 8425893500095.

It is an arithmetic number, because the mean of its divisors is an integer number (8425893500095).

Almost surely, 2^{16851787000189} is an apocalyptic number.

It is an amenable number.

16851787000189 is a deficient number, since it is larger than the sum of its proper divisors (1).

16851787000189 is an equidigital number, since it uses as much as digits as its factorization.

16851787000189 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6773760, while the sum is 61.

The spelling of 16851787000189 in words is "sixteen trillion, eight hundred fifty-one billion, seven hundred eighty-seven million, one hundred eighty-nine", and thus it is an aban number.