Perfect Square
999999999999999999999996000000000000000000000004 is a perfect square (999999999999999999999998 × 999999999999999999999998)
999999999999999999999996000000000000000000000004 is a perfect square (999999999999999999999998 × 999999999999999999999998)
10101111 00101001 10001101 00000101 00001110 01000011 10010101 11010110 10010110 01101101 01100010 00100011 00010000 00000101 11001100 01001001 01111100 00000000 00000000 00000100
999999999999999999999996000000000000000000000004 is even
Previous even number is 999999999999999999999996000000000000000000000002
Next even number is 999999999999999999999996000000000000000000000006
999999999999999999999988000000000000000000000059999999999999999999999840000000000000000000000239999999999999999999999808000000000000000000000064
999999999999999999999992000000000000000000000023999999999999999999999968000000000000000000000016