user18196: In Bitcoin, there will only ever be ~21,000,000 coins (slightly less, technically, but I'll just use 21 million for easy calculation). Each bitcoin is 10^8 satoshis. This means there be a maximum:
2,100,000,000,000,000 satoshis


What is the equivalent number for Dogecoin? 
Is it larger than the maximum 64 bit unsigned integer?


user2306: Dogecoin has no maximum, because it mints 10k dogecoins per block, forever.
But to answer the spirit of your question, there are 100 million indivisible parts to a dogecoin. You can see that here.
static const int64_t COIN = 100000000;

There are currently 97 billion dogecoins. This is a bit more than 2^63 satoshis.

Is it larger than the maximum 64 bit unsigned integer?

No, but it wouldn't matter if it was. There isn't a limit of 2^64 satoshis on the total money in Bitcoin (or altcoins). However, there is a limit of 2^64 satoshis per output.

18196: <p>In Bitcoin, there will only ever be ~21,000,000 coins (slightly less, technically, but I'll just use 21 million for easy calculation). Each bitcoin is 10^8 satoshis. This means there be a maximum:</p>

<pre><code>2,100,000,000,000,000 satoshis
</code></pre>

<ul>
<li>What is the equivalent number for Dogecoin? </li>
<li>Is it larger than the maximum 64 bit unsigned integer?</li>
</ul>
 2306: <p>Dogecoin has no maximum, <a href="https://bitcoin.stackexchange.com/questions/19867/reward-schedule-and-maximum-number-of-dogecoins">because it mints 10k dogecoins per block, forever</a>.</p>

<p>But to answer the <em>spirit</em> of your question, there are 100 million indivisible parts to a dogecoin. You can see that <a href="https://github.com/dogecoin/dogecoin/blob/65228644e10328172e9fa3ebe64251983e1153b3/src/util.h#L40" rel="nofollow noreferrer">here</a>.</p>

<pre><code>static const int64_t COIN = 100000000;
</code></pre>

<p>There are currently 97 billion dogecoins. This is a bit more than 2^63 satoshis.</p>

<blockquote>
  <p>Is it larger than the maximum 64 bit unsigned integer?</p>
</blockquote>

<p>No, but it wouldn't matter if it was. There isn't a limit of 2^64 satoshis on the total money in Bitcoin (or altcoins). However, there is a limit of 2^64 satoshis <em>per output</em>.</p>
