Does Ra ever mention it's 6D population?

[cloud]

I don't think he ever did specifically, but I get the feeling it's a very large number.  He said at one point that (circa 1980) there were around 60 million Wanderers (63.10), and at another point that a "significant portion" of those Wanderers were of Ra, confirming it's a "large percentage." (45.3) Which would almost certainly mean millions of Wanderers, perhaps tens of millions.

So if Ra has literally millions of spirits to spare for Wandering work, that would imply a vastly larger number still on the other side, since it's doubtful he'd risk too much of "himself" in Wandering.  So I'd guess the figure is nine or ten digits, at least.

That is good news. I wouldn't feel too well if over time social memory complex populations decrease. The more the merrier.