Address: 1GRaviTaB5kizyHpt1SUSmwjTJkude8FfE
Privkey: 5JvVieeJr7aq1E7B1sy2y7sZE6m91w62ACvU6UpuUmockSb8MQs
Looks like 51 digits to me. You would get a useful response if you said what you are attempting to do and what non-bitcoin-qt software you are using to create a "wallet".
If that's too much for you, the (less secure) mini-private-key format used on Casascius coins could be adapted to LTC.
https://forum.litecoin.net/index.php?topic=2968.0