While you most likely want what BrowserUk said above, here is one that use the fact that your input is numerical.
use bigint;
my $num = 111111555555123456;

my @array;
while( $num ){
    unshift @array, $num % 1_000_000;
    $num /= 1_000_000;
}

print "@array\n";

[download]
Though it will be eating leading zeros.

In reply to Re: Breaking up a string? by lidden
in thread Breaking up a string? by Anonymous Monk

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