The color depth for my home ip-camera

Bpp or bits per pixel denotes the number of bits per pixel,if the value is 32 ,it can create
4294967296 colors (4294 million colors) (2**32).

In my home ip-camera,the setting arguments say:

resolution : 1920*1080
fps:  25
bitrate:  1024kb/s

I solve BPP of my ip-camera:

BPP = (Width x Height x Framerate)/(1000*Bitrate in kbps)
    = (1920*1080*25)/(1000*1024)
    = 50

2**50 is a huge number,1125899906842624!

Is that true for my ip-camera?