Perfect Square
1820428670967460129 is a perfect square (1349232623 × 1349232623)
1820428670967460129 is a perfect square (1349232623 × 1349232623)
1820428670967460129 is odd
Previous odd number is 1820428670967460127
Next odd number is 1820428670967460131
1100101000011011101100011101100101111111100111011000100100001