16768684817 has 2 divisors, whose sum is σ = 16768684818. Its totient is φ = 16768684816.

The previous prime is 16768684799. The next prime is 16768684837. The reversal of 16768684817 is 71848686761.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9920956816 + 6847728001 = 99604^2 + 82751^2 .

It is a cyclic number.

It is not a de Polignac number, because 16768684817 - 2⁶ = 16768684753 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16768684817.

It is not a weakly prime, because it can be changed into another prime (16768684837) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8384342408 + 8384342409.

It is an arithmetic number, because the mean of its divisors is an integer number (8384342409).

Almost surely, 2^16768684817 is an apocalyptic number.

It is an amenable number.

16768684817 is a deficient number, since it is larger than the sum of its proper divisors (1).

16768684817 is an equidigital number, since it uses as much as digits as its factorization.

16768684817 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 21676032, while the sum is 62.

The spelling of 16768684817 in words is "sixteen billion, seven hundred sixty-eight million, six hundred eighty-four thousand, eight hundred seventeen".