This is why I like programming languages with type systems and "numerical towers":

    Prelude> "9223372036854775807" == "9223372036854775808"
    False
    Prelude> "9223372036854775807" == 9223372036854775808

    <interactive>:1:25:
        No instance for (Num [Char])
          arising from the literal `9223372036854775808'
                   at <interactive>:1:25-43
        Possible fix: add an instance declaration for (Num [Char])
        In the second argument of `(==)', namely `9223372036854775808'
        In the expression: "9223372036854775807" == 9223372036854775808
        In the definition of `it':
        it = "9223372036854775807" == 9223372036854775808
    Prelude>

Yes. Strings are not numbers.