Just one odditiy of JS

callable_number.js

function CallableNumberGenerator(value, func) {

  var selfFunction = function() {
    var v = func.apply(null, arguments);
    return CallableNumberGenerator(v, func);
  }

  var callableNumber = selfFunction.bind(null, value);
  var value = value;

  callableNumber.valueOf = function(){ return value };

  return callableNumber;
}

function add() {
  var value = 0;
  for(idx in arguments) {
    value += arguments[idx];
  }

  return value;
}

function multiply(){
  var value = 1;
  for(idx in arguments) {
    value *= arguments[idx];
  }

  return value;
}

var addSeries = CallableNumberGenerator(1, add);
var multSeries = CallableNumberGenerator(2, multiply);

// Initial value remains the same for a given series
console.log(addSeries); // 1
console.log(addSeries(1)); // 2
console.log(addSeries(5,6,7)); // 19

var cpy = addSeries(5, 6, 7)(10)(4)(3, 2)(9);
console.log(cpy + 2);
cpy(3);
console.log(cpy == 47);

console.log(multSeries(2));
console.log(multSeries(2)(2, 4));