Perfect Square
63897826907258480161 is a perfect square (7993611631 × 7993611631)
63897826907258480161 is a perfect square (7993611631 × 7993611631)
63897826907258480161 is odd
Previous odd number is 63897826907258480159
Next odd number is 63897826907258480163
110111011011000010101011110000011011100110100010011110011000100001
260890500323221490793359161158549803278085017893864384413281