17019666409 has 2 divisors, whose sum is σ = 17019666410. Its totient is φ = 17019666408.

The previous prime is 17019666379. The next prime is 17019666481. The reversal of 17019666409 is 90466691071.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10190296809 + 6829369600 = 100947^2 + 82640^2 .

It is a cyclic number.

It is not a de Polignac number, because 17019666409 - 2⁷ = 17019666281 is a prime.

It is not a weakly prime, because it can be changed into another prime (17019666809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8509833204 + 8509833205.

It is an arithmetic number, because the mean of its divisors is an integer number (8509833205).

Almost surely, 2^17019666409 is an apocalyptic number.

It is an amenable number.

17019666409 is a deficient number, since it is larger than the sum of its proper divisors (1).

17019666409 is an equidigital number, since it uses as much as digits as its factorization.

17019666409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 489888, while the sum is 49.

The spelling of 17019666409 in words is "seventeen billion, nineteen million, six hundred sixty-six thousand, four hundred nine".