Perfect Square
81537712096133368494721 is a perfect square (285548090689 × 285548090689)
81537712096133368494721 is a perfect square (285548090689 × 285548090689)
81537712096133368494721 is odd
Previous odd number is 81537712096133368494719
Next odd number is 81537712096133368494723
10001010001000010101100010001000110100001111010100100101111111011101010000001
542095202293696448400921373365268429149959693081164470421060111167361