16565321376011 has 2 divisors, whose sum is σ = 16565321376012. Its totient is φ = 16565321376010.

The previous prime is 16565321375983. The next prime is 16565321376041. The reversal of 16565321376011 is 11067312356561.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 16565321376011 - 2¹⁴ = 16565321359627 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (16565321376041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8282660688005 + 8282660688006.

It is an arithmetic number, because the mean of its divisors is an integer number (8282660688006).

Almost surely, 2^{16565321376011} is an apocalyptic number.

16565321376011 is a deficient number, since it is larger than the sum of its proper divisors (1).

16565321376011 is an equidigital number, since it uses as much as digits as its factorization.

16565321376011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 680400, while the sum is 47.

The spelling of 16565321376011 in words is "sixteen trillion, five hundred sixty-five billion, three hundred twenty-one million, three hundred seventy-six thousand, eleven".