16563003334217 has 2 divisors, whose sum is σ = 16563003334218. Its totient is φ = 16563003334216.

The previous prime is 16563003334211. The next prime is 16563003334327. The reversal of 16563003334217 is 71243330036561.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8687997946681 + 7875005387536 = 2947541^2 + 2806244^2 .

It is an emirp because it is prime and its reverse (71243330036561) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16563003334217 - 2¹⁶ = 16563003268681 is a prime.

It is not a weakly prime, because it can be changed into another prime (16563003334211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8281501667108 + 8281501667109.

It is an arithmetic number, because the mean of its divisors is an integer number (8281501667109).

Almost surely, 2^{16563003334217} is an apocalyptic number.

It is an amenable number.

16563003334217 is a deficient number, since it is larger than the sum of its proper divisors (1).

16563003334217 is an equidigital number, since it uses as much as digits as its factorization.

16563003334217 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 816480, while the sum is 44.

The spelling of 16563003334217 in words is "sixteen trillion, five hundred sixty-three billion, three million, three hundred thirty-four thousand, two hundred seventeen".