title: Issue working with numbers in Javascript
body: <p>I'm new in developing javascript apps, i have a doubt about a behaviour that i'm going to try to explain.</p>
  
  <p>If i execute:</p>
  
  <pre><code>Number(5555555555555555);
  </code></pre>
  
  <p><strong>Result:</strong> 5555555555555555</p>
  
  <p>But if i execute:</p>
  
  <pre><code>Number(55555555555555555);
  </code></pre>
  
  <p><strong>Result:</strong> 55555555555555550</p>
  
  <p>Anybody can explain to me what is the reason of this? Thanks!!</p>