All weights are Hi → Lo :

Binary [0-1]   2ⁿ ... 2²   2¹   2⁰
Octal [0-7]   8ⁿ ... 8²   8¹   8⁰
Decimal [0-9]   10ⁿ ... 10²   10¹   10⁰
Hexadecimal [0-9][A-F]   16ⁿ ... 16²   16¹   16⁰

Value range for each data type :

Int8 aka SByte or SINT [8-bit]
    -128 to 127
UInt8 aka Byte or USINT [8-bit]
    0 to 255

Int16 aka Short or INT [16-bit]
    -32,768 to 32,767
UInt16 aka UShort or UINT or WORD [16-bit]
    0 to 65,535

Int32 aka Integer or DINT [32-bit]
    -2,147,483,648 to 2,147,483,647
UInt32 aka UInteger or UDINT or DWORD [32-bit]
    0 to 4,294,967,295

Int64 aka Long or LINT [64-bit]
    -9,223,372,036,854,775,808 to 9,223,372,036,854,775,807
UInt64 aka ULong or ULINT or LWORD [64-bit]
    0 to 18,446,744,073,709,551,615

Int128 [128-bit]     −2¹²⁷ to 2¹²⁷ − 1
UInt128 [128-bit]     0 to 2¹²⁸ − 1

Float32 aka Single or REAL [32-bit]
    -3.4028235E+38 to -1.401298E-45
    1.401298E-45 to 3.4028235E+38
Float64 aka Double or LREAL [64-bit]
    -1.79769313486231570E+308 to -4.94065645841246544E-324
    4.94065645841246544E-324 to 1.79769313486231570E+308

Float parser will complete parsing the string as a number if it encounters an invalid character as per standard number rules

Hover over number type labels for additional info