Perfect Square
81537712094991176131969 is a perfect square (285548090687 × 285548090687)
81537712094991176131969 is a perfect square (285548090687 × 285548090687)
81537712094991176131969 is odd
Previous odd number is 81537712094991176131967
Next odd number is 81537712094991176131971
10001010001000010101100010001000110010001010010110100110001110110010110000001
542095202270915198448543229586195370311018100849599739908756356526209