Fait général: 1624 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fait mathématique: 1624 is the Stirling number of the first kind s(7,3).
Culture générale: 1624 is an uninteresting number.
Date historique: June 11th is the day in 1956 that Start of Gal Oya riots, the first reported ethnic riots that target minority Sri Lankan Tamils in the Eastern Province.