16163223538909 has 2 divisors, whose sum is σ = 16163223538910. Its totient is φ = 16163223538908.

The previous prime is 16163223538877. The next prime is 16163223538997. The reversal of 16163223538909 is 90983532236161.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13583094525625 + 2580129013284 = 3685525^2 + 1606278^2 .

It is an emirp because it is prime and its reverse (90983532236161) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16163223538909 - 2⁵ = 16163223538877 is a prime.

It is a super-2 number, since 2×16163223538909² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16163223538999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8081611769454 + 8081611769455.

It is an arithmetic number, because the mean of its divisors is an integer number (8081611769455).

Almost surely, 2^{16163223538909} is an apocalyptic number.

It is an amenable number.

16163223538909 is a deficient number, since it is larger than the sum of its proper divisors (1).

16163223538909 is an equidigital number, since it uses as much as digits as its factorization.

16163223538909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12597120, while the sum is 58.

The spelling of 16163223538909 in words is "sixteen trillion, one hundred sixty-three billion, two hundred twenty-three million, five hundred thirty-eight thousand, nine hundred nine".