Perfect Square
81534050057231274665761 is a perfect square (285541678319 × 285541678319)
81534050057231274665761 is a perfect square (285541678319 × 285541678319)
81534050057231274665761 is odd
Previous odd number is 81534050057231274665759
Next odd number is 81534050057231274665763
10001010000111111100000111110111011010010001111111011110010001110011100100001
542022165492275333911634784787887736711076319265170201107130924106081