Perfect Square
81535270745621943061249 is a perfect square (285543815807 × 285543815807)
81535270745621943061249 is a perfect square (285543815807 × 285543815807)
81535270745621943061249 is odd
Previous odd number is 81535270745621943061247
Next odd number is 81535270745621943061251
10001010001000000100100101111101011101100001110101111000001001000101100000001
542046510538433710688961351773377756676658729064383476013397777621249