17081705809 has 9 divisors (see below), whose sum is σ = 19871620041. Its totient is φ = 14640677940.

The previous prime is 17081705761. The next prime is 17081705813. The reversal of 17081705809 is 90850718071.

The square root of 17081705809 is 130697.

It is a perfect power (a square), and thus also a powerful number.

17081705809 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 17081705809 - 2¹³ = 17081697617 is a prime.

It is not an unprimeable number, because it can be changed into a prime (17081709809) 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 in 8 ways as a sum of consecutive naturals, for example, 905544 + ... + 924214.

Almost surely, 2^17081705809 is an apocalyptic number.

17081705809 is the 130697-th square number.

17081705809 is the 65349-th centered octagonal number.

It is an amenable number.

17081705809 is a deficient number, since it is larger than the sum of its proper divisors (2789914232).

17081705809 is an frugal number, since it uses more digits than its factorization.

17081705809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37356 (or 18678 counting only the distinct ones).

The product of its (nonzero) digits is 141120, while the sum is 46.

The spelling of 17081705809 in words is "seventeen billion, eighty-one million, seven hundred five thousand, eight hundred nine".