Fatto generale: 5491 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 5491 is an uninteresting number.
Trivia: 5491 is an unremarkable number.
Data storica: January 12th is the day in 1911 that the University of the Philippines College of Law is formally established; three future Philippine presidents are among the first enrollees.