216512321688563 has 2 divisors, whose sum is σ = 216512321688564. Its totient is φ = 216512321688562.

The previous prime is 216512321688521. The next prime is 216512321688583. The reversal of 216512321688563 is 365886123215612.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 216512321688563 - 2⁶ = 216512321688499 is a prime.

It is not a weakly prime, because it can be changed into another prime (216512321688583) 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, 108256160844281 + 108256160844282.

It is an arithmetic number, because the mean of its divisors is an integer number (108256160844282).

Almost surely, 2^{216512321688563} is an apocalyptic number.

216512321688563 is a deficient number, since it is larger than the sum of its proper divisors (1).

216512321688563 is an equidigital number, since it uses as much as digits as its factorization.

216512321688563 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24883200, while the sum is 59.

The spelling of 216512321688563 in words is "two hundred sixteen trillion, five hundred twelve billion, three hundred twenty-one million, six hundred eighty-eight thousand, five hundred sixty-three".