Hecho general: 11637 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Hecho matemático: 11637 is a boring number.
Trivia: 11637 is an unremarkable number.
Fecha histórica: November 10th is the day in 1989 that Longtime leader of the People's Republic of Bulgaria Todor Zhivkov is removed from office and replaced by Petar Mladenov.