How much RAM does Excel use in 64-bit?

Could you please clarify for me the specific amount of RAM that Microsoft Excel utilizes when running in its 64-bit version? I'm interested in understanding the memory requirements for this software, as it's crucial for managing large datasets and ensuring smooth performance. Additionally, does the RAM usage vary depending on the complexity of the tasks being performed or the size of the data being handled? I'm looking for a concise yet informative answer that can help me make an informed decision regarding my hardware requirements.