16163533203809 has 2 divisors, whose sum is σ = 16163533203810. Its totient is φ = 16163533203808.

The previous prime is 16163533203751. The next prime is 16163533203823. The reversal of 16163533203809 is 90830233536161.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9727088093584 + 6436445110225 = 3118828^2 + 2537015^2 .

It is a cyclic number.

It is not a de Polignac number, because 16163533203809 - 2⁸ = 16163533203553 is a prime.

It is a super-2 number, since 2×16163533203809² (a number of 27 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (16163533203509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8081766601904 + 8081766601905.

It is an arithmetic number, because the mean of its divisors is an integer number (8081766601905).

Almost surely, 2^{16163533203809} is an apocalyptic number.

It is an amenable number.

16163533203809 is a deficient number, since it is larger than the sum of its proper divisors (1).

16163533203809 is an equidigital number, since it uses as much as digits as its factorization.

16163533203809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2099520, while the sum is 50.

The spelling of 16163533203809 in words is "sixteen trillion, one hundred sixty-three billion, five hundred thirty-three million, two hundred three thousand, eight hundred nine".