16564057217189 has 2 divisors, whose sum is σ = 16564057217190. Its totient is φ = 16564057217188.

The previous prime is 16564057217143. The next prime is 16564057217231. The reversal of 16564057217189 is 98171275046561.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15745158912289 + 818898304900 = 3968017^2 + 904930^2 .

It is a cyclic number.

It is not a de Polignac number, because 16564057217189 - 2⁴⁰ = 15464545589413 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16564057217119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8282028608594 + 8282028608595.

It is an arithmetic number, because the mean of its divisors is an integer number (8282028608595).

Almost surely, 2^{16564057217189} is an apocalyptic number.

It is an amenable number.

16564057217189 is a deficient number, since it is larger than the sum of its proper divisors (1).

16564057217189 is an equidigital number, since it uses as much as digits as its factorization.

16564057217189 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25401600, while the sum is 62.

The spelling of 16564057217189 in words is "sixteen trillion, five hundred sixty-four billion, fifty-seven million, two hundred seventeen thousand, one hundred eighty-nine".