Fatto generale: 5563 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 5563 is an uninteresting number.
Trivia: 5563 is an unremarkable number.
Data storica: March 25th is the day in 1988 that the Candle demonstration in Bratislava is the first mass demonstration of the 1980s against the communist regime in Czechoslovakia.