So, I ran the numbers. As of 0.4.8, the maximum stat size (142,159,079,146 mi) is slightly over 160,000 times the diameter of our sun.
F*cking astounding.
I got like most of the growth multipliers you can have (without adding corruption.) and in battle, each time is like tens of miles added now. (all the Draco Ability really, getting up to over 30 Miles added each time now.)
Abilities pertaining to growth: Cray and Nyx memories, appetite for growth 5, Draco's omnipotence 10, unstoppable expansion 10, orgasmic growth 3.
Current level, 86, 1983+ miles right now.
Corruption is 30 cause the memory boosts. (no corruption gain since the newgame+ starting.)