16221206600653 has 2 divisors, whose sum is σ = 16221206600654. Its totient is φ = 16221206600652.

The previous prime is 16221206600587. The next prime is 16221206600689. The reversal of 16221206600653 is 35600660212261.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13915309684329 + 2305896916324 = 3730323^2 + 1518518^2 .

It is an emirp because it is prime and its reverse (35600660212261) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16221206600653 - 2¹⁷ = 16221206469581 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16221206100653) 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, 8110603300326 + 8110603300327.

It is an arithmetic number, because the mean of its divisors is an integer number (8110603300327).

Almost surely, 2^{16221206600653} is an apocalyptic number.

It is an amenable number.

16221206600653 is a deficient number, since it is larger than the sum of its proper divisors (1).

16221206600653 is an equidigital number, since it uses as much as digits as its factorization.

16221206600653 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 155520, while the sum is 40.

The spelling of 16221206600653 in words is "sixteen trillion, two hundred twenty-one billion, two hundred six million, six hundred thousand, six hundred fifty-three".