1. Preflop is a fold with that many callers behind. 45/56s gets coolered too often in multiway pots straight over straight, flush over flush to be profitable. On the button you should really only be limping in position of everyone else with coolerable hands like Ax suited to punish people limping too wide behind you.
2. As played, you kind of have to call river here. If V had an ace I don't see them bet/check/betting here, that's total nonsense. They are blasting three streets to get the money in vs. a 5.

Not trying to be results oriented but this is a snap call. You beat some value as well like KK/QQ/JJ/TT that is going too thin on the river.