This document summarizes different immutable data types in Python including numeric data types, strings, bytes, frozen sets, and tuples. Numeric data types like integers, booleans, floats, and decimals cannot be changed after creation. Strings are immutable sequences of Unicode characters. Bytes are used to encode strings for storage or transmission. Frozen sets are like regular sets but cannot be modified. Tuples are immutable ordered sequences that are commonly used to group related data and cannot be changed after creation.