Problem 252. Project Euler: Problem 16, Sums of Digits of Powers of Two

Created by @bmtran (Bryant Tran)

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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^N?

Thanks to Project Euler Problem 16.

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Last Solution submitted on Jan 15, 2026

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@bmtran (Bryant Tran) on 4 Feb 2012

added a test case to make it a wee bit harder

Hoang Minh Tri on 19 Nov 2025

ta cần nhân 2 cho đến khi đủ mũ n và hãy lưu ý rằng nên để kết quả dưới dạng char để tránh bị tràn số vì input là mũ rất lớn

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