Fatto matematico: 4536 is the Stirling number of the first kind s(9,6).
Trivia: 4536 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Data storica: June 1st is the day in 1779 that Benedict Arnold, a general in the Continental Army during the American Revolutionary War, is court-martialed for malfeasance.