Fait général: 5491 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fait mathématique: 5491 is a boring number.
Culture générale: 5491 is a boring number.
Date historique: January 12th is the day in 1966 that Lyndon B. Johnson states that the United States should stay in South Vietnam until Communist aggression there is ended.