How are UQ Holder member numbers attributed?


In page 12 of chapter 11, Touta and Kuroumaru are officially accepted in UQ
Holder. They are, respectively, attributed the numbers 7 and 11:

[![Touta and Kuroumaru being told their
numbers](https://i.stack.imgur.com/g0it5m.png)](https://i.stack.imgur.com/g0it5.png)

**Do these numbers mean anything in particular** and correspond to something
in terms of hierarchy (of power or ranking)? If so, how powerful/ranked are
Touta and Kuroumaru?  
**Or are they just randomly chosen?**




Not sure if this is considered canon, as I stopped reading the manga and am
not sure if further details were revealed, but...

On episode 3 of the anime, when Touta and Kuromaru meet Jinbei Shishido, he
tells 'em he's number 2, and Kuromaru says:

[![enter image description
here](https://i.stack.imgur.com/mpgk6m.jpg)](https://i.stack.imgur.com/mpgk6.jpg)

Again, not sure if this is canon. Also not sure if Kuromaru is just making an
assumption, or if this is a given in the anime — there are some different
things in the adaptation, and I don't remember this bit of conversation from
the manga. But, if this is not an assumption, then the numbers are attributed
according to how powerful the characters are.

