It's a lot, but completely possible (Johnny Rocket's Bacon Cheddar double burger 3500kcal, Cheesecake factory Breakfast burrito 2730kcal, Sonic Pineapple upside down shake 2020kcal). These are one off dishes/items.. combined with a starter or dessert, snacking, or a "cheat day" you can exceed.

It's really not that much when you're fat. A Domino's medium pizza is over 1600 calories and I can eat that as a thin person. Add in soda, dessert, etc. And if you have a 'cheat day' which is a common pattern, then it's trivial.

I used to eat a medium pizza from there... after eating nothing the entire day. I do think it depends on what your cheat days look like, but I'd struggle to get anywhere near 3500 calories.

Yes, I know that Cheesecake Factory & such have some high calorie foods on the menu as a sibling comment mentions. I also know that I avoid that place like the plague because I hate wasting food and I can't even eat half of most of their dishes. The few times I have gone, I literally looked at the calories listed on the menu to find suitable items that I wouldn't end up wasting.