Is it normal for a breastfed baby to sleep 5 hours at night?

I don’t know if I’m lucky or if it’s not ok. My son is 11 days old and sleeping about 5 hours at night. Is this normal? He eats every 2 hours during the day. It’s just at night that he sleeps this long. He’s gaining weight and he eats well. I just thought he wouldn’t be sleeping that much at night.