16731984959917 has 2 divisors, whose sum is σ = 16731984959918. Its totient is φ = 16731984959916.

The previous prime is 16731984959861. The next prime is 16731984959933. The reversal of 16731984959917 is 71995948913761.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9241806721156 + 7490178238761 = 3040034^2 + 2736819^2 .

It is a cyclic number.

It is not a de Polignac number, because 16731984959917 - 2¹¹ = 16731984957869 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16731984959717) 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, 8365992479958 + 8365992479959.

It is an arithmetic number, because the mean of its divisors is an integer number (8365992479959).

Almost surely, 2^{16731984959917} is an apocalyptic number.

It is an amenable number.

16731984959917 is a deficient number, since it is larger than the sum of its proper divisors (1).

16731984959917 is an equidigital number, since it uses as much as digits as its factorization.

16731984959917 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 925888320, while the sum is 79.

The spelling of 16731984959917 in words is "sixteen trillion, seven hundred thirty-one billion, nine hundred eighty-four million, nine hundred fifty-nine thousand, nine hundred seventeen".