Pointers are usually stored in 64-bits on 64-bit systems, but some of the bits may be unused depending on hardware. Each CPU/platform has its own limit for the

Pointers are usually stored in 64-bits on 64-bit systems, but some of the bits may be unused depending on hardware. Each CPU/platform has its own limit for the size of the virtual and physical address space. But the standard size of pointers in memory stays the same.