Look at your GVWR and GCWR. Those are the real limiting factors. Weigh your truck loaded up with passengers. Whatever is left from GVWR is the weight your vehicle can handle as far as other payload and tongue weight of your trailer. The GCWR is the weight of your vehicle loaded up and trailer loaded up. Although going over a little is not really a problem, it would be best to stay within those weights.
Do not listen to those who say you can go over, or even pull that 9800lbs. If you do then most certainly you will be well over the other numbers. When looking at trailers, ignore the empty weight. Your trailer will never be empty. Use the GVWR of the trailer as the weight you will be towing. Tongue weight should be 8 to 15% of the trailer weight.
Also, any trailer over 5000lbs and you must use a WD (weight distribution) hitch. The 5000 is what your hitch is rated at for regular towing (no WD hitch). That also includes a 500lb tongue weight.
Just guessing, without knowing all your numbers, I would think your max would be in the area of 7000lbs. But again that is only a guess. It may be lower.