16812656717 has 2 divisors, whose sum is σ = 16812656718. Its totient is φ = 16812656716.

The previous prime is 16812656687. The next prime is 16812656741. The reversal of 16812656717 is 71765621861.

It is a happy number.

16812656717 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., 14955822436 + 1856834281 = 122294^2 + 43091^2 .

It is a cyclic number.

It is not a de Polignac number, because 16812656717 - 2¹² = 16812652621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16812656797) 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, 8406328358 + 8406328359.

It is an arithmetic number, because the mean of its divisors is an integer number (8406328359).

Almost surely, 2^16812656717 is an apocalyptic number.

It is an amenable number.

16812656717 is a deficient number, since it is larger than the sum of its proper divisors (1).

16812656717 is an equidigital number, since it uses as much as digits as its factorization.

16812656717 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 846720, while the sum is 50.

The spelling of 16812656717 in words is "sixteen billion, eight hundred twelve million, six hundred fifty-six thousand, seven hundred seventeen".