Fait général: 15558 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fait mathématique: 15558 is an uninteresting number.
Culture générale: 15558 is an uninteresting number.
Date historique: August 5th is the day in 1858 that Cyrus West Field and others complete the first transatlantic telegraph cable after several unsuccessful attempts.