"Tank capacity constitutes 365 tons. Fuel is held in 13 wing integral tanks. The aircraft can keep on flying for 18 hours and cover the distance of more than 15 000 km."
Wikipedia says the range at maximum load is 2500 miles, so if that's correct, endurance must be significantly longer given that it doesn't go supersonic.
So, many large airplanes maximum fuel + maximum payload will be well above maximum takeoff weight. This is actually a good thing, as it means you have lots of flexibility about how you allocate that. Transporting a bulky but not especially heavy payload you can go max fuel and have tremendous range , without compromising the maximum load you can carry - it's just that when maxing the payload weight you may be taking off with tanks 20% full, or even a bit less.
I assume that is a typo.