As it is it wouldn't be present perfect continuous, which requires rather exact periods of time (e.g. yesterday, a year ago, when I was a teenager...).
It is, however, present perfect, which does allow for unspecific expressions such as never, ever, before etc.
There's a bit of context missing in your sentence though (not that it particularly matters in this case), as it can be taken like:
Wow, look at that poor homeless person digging for food in the bin. I
have never been so hungry [as to do that].
I can hear my stomach growling. I have never been so hungry [before].