Fatto generale: 86564 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 86564 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Trivia: 86564 is an unremarkable number.
Data storica: January 1st is the day in 417 that Emperor Honorius forces Galla Placidia into marriage to Constantius, his famous general (magister militum).