Fait général: 61840 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fait mathématique: 61840 is a boring number.
Culture générale: 61840 is a boring number.
Date historique: April 23rd is the day in 215 BC that a temple is built on the Capitoline Hill dedicated to Venus Erycina to commemorate the Roman defeat at Lake Trasimene.