16565321375983 has 2 divisors, whose sum is σ = 16565321375984. Its totient is φ = 16565321375982.

The previous prime is 16565321375929. The next prime is 16565321376011. The reversal of 16565321375983 is 38957312356561.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 16565321375983 - 2³³ = 16556731441391 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16565321375483) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8282660687991 + 8282660687992.

It is an arithmetic number, because the mean of its divisors is an integer number (8282660687992).

Almost surely, 2^{16565321375983} is an apocalyptic number.

16565321375983 is a deficient number, since it is larger than the sum of its proper divisors (1).

16565321375983 is an equidigital number, since it uses as much as digits as its factorization.

16565321375983 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 122472000, while the sum is 64.

The spelling of 16565321375983 in words is "sixteen trillion, five hundred sixty-five billion, three hundred twenty-one million, three hundred seventy-five thousand, nine hundred eighty-three".