This is a single byte, so it’s represented the same in big-endian vs little-endian. Endianness defines the order of bytes, not individual bits

That’s the sign bit. The cake is in two’s complement

That’s impossible. You’d need at least one neuron per atom, but each neuron has many atoms of its own

What do you mean you’re unable to install it? That screenshot is not what the package installer looks like.