16868336717 has 4 divisors (see below), whose sum is σ = 17860591836. Its totient is φ = 15876081600.

The previous prime is 16868336713. The next prime is 16868336753. The reversal of 16868336717 is 71763386861.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 71763386861 = 13381 ⋅5363081.

It can be written as a sum of positive squares in 2 ways, for example, as 10284799396 + 6583537321 = 101414^2 + 81139^2 .

It is a cyclic number.

It is not a de Polignac number, because 16868336717 - 2² = 16868336713 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 (16868336713) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 496127534 + ... + 496127567.

It is an arithmetic number, because the mean of its divisors is an integer number (4465147959).

Almost surely, 2^16868336717 is an apocalyptic number.

16868336717 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

16868336717 is a deficient number, since it is larger than the sum of its proper divisors (992255119).

16868336717 is an equidigital number, since it uses as much as digits as its factorization.

16868336717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 992255118.

The product of its digits is 6096384, while the sum is 56.

The spelling of 16868336717 in words is "sixteen billion, eight hundred sixty-eight million, three hundred thirty-six thousand, seven hundred seventeen".