As character names:

U+1105E BRAHMI NUMBER FORTY character (𑁞)

As raw characters:

𑁞

As a string of HTML entities:

𑁞

Decoder output:

Byte number 1 is decimal 240, hex 0xF0, octal \360, binary 11110000
This is the first byte of a 4 byte sequence.

Byte number 2 is decimal 145, hex 0x91, octal \221, binary 10010001
This is continuation byte 1, expecting 2 more.

Byte number 3 is decimal 129, hex 0x81, octal \201, binary 10000001
This is continuation byte 2, expecting 1 more.

Byte number 4 is decimal 158, hex 0x9E, octal \236, binary 10011110
This is continuation byte 3, expecting 0 more.

U+1105E	BRAHMI NUMBER FORTY