Fatto generale: 11644 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 11644 is an unremarkable number.
Trivia: 11644 is an unremarkable number.
Data storica: November 17th is the day in 1953 that the remaining human inhabitants of the Blasket Islands, Kerry, Ireland are evacuated to the mainland.