Fatto matematico: 2558 is the number of divisors of the 15^{th} perfect number.
Trivia: 2558 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Data storica: January 1st is the day in 1959 that Fulgencio Batista, dictator of Cuba, is overthrown by Fidel Castro's forces during the Cuban Revolution.