16443338693 has 2 divisors, whose sum is σ = 16443338694. Its totient is φ = 16443338692.

The previous prime is 16443338603. The next prime is 16443338707. The reversal of 16443338693 is 39683334461.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14778535489 + 1664803204 = 121567^2 + 40802^2 .

It is a cyclic number.

It is not a de Polignac number, because 16443338693 - 2¹⁶ = 16443273157 is a prime.

It is a super-3 number, since 3×16443338693³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16443338603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8221669346 + 8221669347.

It is an arithmetic number, because the mean of its divisors is an integer number (8221669347).

Almost surely, 2^16443338693 is an apocalyptic number.

It is an amenable number.

16443338693 is a deficient number, since it is larger than the sum of its proper divisors (1).

16443338693 is an equidigital number, since it uses as much as digits as its factorization.

16443338693 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3359232, while the sum is 50.

The spelling of 16443338693 in words is "sixteen billion, four hundred forty-three million, three hundred thirty-eight thousand, six hundred ninety-three".