To do this just add the ng-click directive to your parent element so that every click inside that element evaluates the expression inside the ng-click attribute:
<div class="parent" ng-click="callFunction()">
<div>Hello World</div>
</div>
If you want some clicks inside the parent element to not trigger the parent ng-click you can add $event.stopPropagation() to stop event propagation:
<div class="parent" ng-click="callFunction()">
<div>Clicking here will call parent callFunction()</div>
<div ng-click="$event.stopPropagation();callAnotherFunction();">
Clicking here won´t call parent´s callFunction()
</div>
</div>