16559521133 has 2 divisors, whose sum is σ = 16559521134. Its totient is φ = 16559521132.

The previous prime is 16559521093. The next prime is 16559521157. The reversal of 16559521133 is 33112595561.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12170061124 + 4389460009 = 110318^2 + 66253^2 .

It is an emirp because it is prime and its reverse (33112595561) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16559521133 - 2¹⁴ = 16559504749 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16559521183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8279760566 + 8279760567.

It is an arithmetic number, because the mean of its divisors is an integer number (8279760567).

Almost surely, 2^16559521133 is an apocalyptic number.

It is an amenable number.

16559521133 is a deficient number, since it is larger than the sum of its proper divisors (1).

16559521133 is an equidigital number, since it uses as much as digits as its factorization.

16559521133 is an evil number, because the sum of its binary digits is even.

The product of its digits is 121500, while the sum is 41.

The spelling of 16559521133 in words is "sixteen billion, five hundred fifty-nine million, five hundred twenty-one thousand, one hundred thirty-three".