Power digit sum

Author: L. Grondin

https://projecteuler.net/problem=16

2^15 = 32768 and the sum of its digits is 3 + 2 + 7 + 6 + 8 = 26.

What is the sum of the digits of the number 2^1000?

Source code: prob016-grondilu.pl

use v6;

say [+] .comb given 2**1_000;