As a rule you always write them together so take your pick. I believe this one has 90 characters but you might find a longer one.
Stosiedemdziesiąttrzymilionyczterystadwadzieściadziewięćtysięcytrzysta sześćdziesiątytrzeci.
the correct spelling is (in my opinion, but I don't have time for a reasearch now):
Sto siedemdziesiąt trzy miliony czterysta dwadzieścia dziewięć tysięcy trzysta sześćdziesiątytrzeci
you guys are trying to create a monster :)
a simple long word in Polish (a word that you may actually use in real life, unlike KONSTANTYNOPOLITAŃCZYKOWIANECZKA)
could be indicating a person's age:
dwiewięćdziesięciodziewięciolatka (33 letters) - a 99 years old woman (of course according to Michal it's a sci-fi, because life expentancy in Poland is barely 55 years or so)
LOL :)