16671316709 has 2 divisors, whose sum is σ = 16671316710. Its totient is φ = 16671316708.

The previous prime is 16671316637. The next prime is 16671316723. The reversal of 16671316709 is 90761317661.

16671316709 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16345622500 + 325694209 = 127850^2 + 18047^2 .

It is a cyclic number.

It is not a de Polignac number, because 16671316709 - 2¹⁶ = 16671251173 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16671316729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8335658354 + 8335658355.

It is an arithmetic number, because the mean of its divisors is an integer number (8335658355).

Almost surely, 2^16671316709 is an apocalyptic number.

It is an amenable number.

16671316709 is a deficient number, since it is larger than the sum of its proper divisors (1).

16671316709 is an equidigital number, since it uses as much as digits as its factorization.

16671316709 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 285768, while the sum is 47.

The spelling of 16671316709 in words is "sixteen billion, six hundred seventy-one million, three hundred sixteen thousand, seven hundred nine".