Fatto generale: 15659 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 15659 is an uninteresting number.
Trivia: 15659 is a boring number.
Data storica: November 14th is the day in 1967 that the Congress of Colombia, in commemoration of the 150 years of the death of Policarpa Salavarrieta, declares this day as "Day of the Colombian Woman".