717199991717 has 16 divisors (see below), whose sum is σ = 803538912960. Its totient is φ = 634603056000.

The previous prime is 717199991701. The next prime is 717199991723.

717199991717 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 717199991717 - 2⁴ = 717199991701 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (717199991777) 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 in 15 ways as a sum of consecutive naturals, for example, 5405168 + ... + 5536265.

It is an arithmetic number, because the mean of its divisors is an integer number (50221182060).

Almost surely, 2^717199991717 is an apocalyptic number.

It is an amenable number.

717199991717 is a deficient number, since it is larger than the sum of its proper divisors (86338921243).

717199991717 is a wasteful number, since it uses less digits than its factorization.

717199991717 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10941604.

The product of its digits is 15752961, while the sum is 68.

The spelling of 717199991717 in words is "seven hundred seventeen billion, one hundred ninety-nine million, nine hundred ninety-one thousand, seven hundred seventeen".