16816453817 has 2 divisors, whose sum is σ = 16816453818. Its totient is φ = 16816453816.

The previous prime is 16816453811. The next prime is 16816453859. The reversal of 16816453817 is 71835461861.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16726507561 + 89946256 = 129331^2 + 9484^2 .

It is an emirp because it is prime and its reverse (71835461861) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16816453817 - 2¹⁸ = 16816191673 is a prime.

It is not a weakly prime, because it can be changed into another prime (16816453811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8408226908 + 8408226909.

It is an arithmetic number, because the mean of its divisors is an integer number (8408226909).

Almost surely, 2^16816453817 is an apocalyptic number.

It is an amenable number.

16816453817 is a deficient number, since it is larger than the sum of its proper divisors (1).

16816453817 is an equidigital number, since it uses as much as digits as its factorization.

16816453817 is an evil number, because the sum of its binary digits is even.

The product of its digits is 967680, while the sum is 50.

The spelling of 16816453817 in words is "sixteen billion, eight hundred sixteen million, four hundred fifty-three thousand, eight hundred seventeen".