16988650404709 has 2 divisors, whose sum is σ = 16988650404710. Its totient is φ = 16988650404708.

The previous prime is 16988650404703. The next prime is 16988650404721. The reversal of 16988650404709 is 90740405688961.

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., 15110440456225 + 1878209948484 = 3887215^2 + 1370478^2 .

It is a cyclic number.

It is not a de Polignac number, because 16988650404709 - 2¹⁹ = 16988649880421 is a prime.

It is a super-2 number, since 2×16988650404709² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16988650404703) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8494325202354 + 8494325202355.

It is an arithmetic number, because the mean of its divisors is an integer number (8494325202355).

Almost surely, 2^{16988650404709} is an apocalyptic number.

It is an amenable number.

16988650404709 is a deficient number, since it is larger than the sum of its proper divisors (1).

16988650404709 is an equidigital number, since it uses as much as digits as its factorization.

16988650404709 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 104509440, while the sum is 67.

The spelling of 16988650404709 in words is "sixteen trillion, nine hundred eighty-eight billion, six hundred fifty million, four hundred four thousand, seven hundred nine".