216644364353 has 2 divisors, whose sum is σ = 216644364354. Its totient is φ = 216644364352.

The previous prime is 216644364337. The next prime is 216644364371. The reversal of 216644364353 is 353463446612.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 195707142544 + 20937221809 = 442388^2 + 144697^2 .

It is a cyclic number.

It is not a de Polignac number, because 216644364353 - 2⁴ = 216644364337 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 216644364298 and 216644364307.

It is not a weakly prime, because it can be changed into another prime (216644369353) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108322182176 + 108322182177.

It is an arithmetic number, because the mean of its divisors is an integer number (108322182177).

Almost surely, 2^216644364353 is an apocalyptic number.

It is an amenable number.

216644364353 is a deficient number, since it is larger than the sum of its proper divisors (1).

216644364353 is an equidigital number, since it uses as much as digits as its factorization.

216644364353 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3732480, while the sum is 47.

The spelling of 216644364353 in words is "two hundred sixteen billion, six hundred forty-four million, three hundred sixty-four thousand, three hundred fifty-three".