A settlement agreement rarely arrives on its own. It comes with a conversation, a deadline and the suggestion that signing quickly is in everyone’s interest.
Three things are worth checking before the week is out: the notice period the agreement assumes, the wording on the reason for the ending — which decides whether your benefit entitlement survives it — and whether anything in it stops you working in your field afterwards.
None of those is visible from the headline figure. Most of them can still be changed in the week you have.