16868567021437 has 2 divisors, whose sum is σ = 16868567021438. Its totient is φ = 16868567021436.

The previous prime is 16868567021357. The next prime is 16868567021473. The reversal of 16868567021437 is 73412076586861.

Together with next prime (16868567021473) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14431686796836 + 2436880224601 = 3798906^2 + 1561051^2 .

It is an emirp because it is prime and its reverse (73412076586861) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16868567021437 - 2²⁷ = 16868432803709 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16868567081437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8434283510718 + 8434283510719.

It is an arithmetic number, because the mean of its divisors is an integer number (8434283510719).

Almost surely, 2^{16868567021437} is an apocalyptic number.

It is an amenable number.

16868567021437 is a deficient number, since it is larger than the sum of its proper divisors (1).

16868567021437 is an equidigital number, since it uses as much as digits as its factorization.

16868567021437 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 81285120, while the sum is 64.

The spelling of 16868567021437 in words is "sixteen trillion, eight hundred sixty-eight billion, five hundred sixty-seven million, twenty-one thousand, four hundred thirty-seven".