163556 has 12 divisors (see below), whose sum is σ = 295680. Its totient is φ = 79080.

The previous prime is 163543. The next prime is 163561. The reversal of 163556 is 655361.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 536 + ... + 783.

It is an arithmetic number, because the mean of its divisors is an integer number (24640).

2¹⁶³⁵⁵⁶ is an apocalyptic number.

It is an amenable number.

163556 is a deficient number, since it is larger than the sum of its proper divisors (132124).

163556 is a wasteful number, since it uses less digits than its factorization.

163556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1354 (or 1352 counting only the distinct ones).

The product of its digits is 2700, while the sum is 26.

The square root of 163556 is about 404.4205731661. The cubic root of 163556 is about 54.6875952651.

It can be divided in two parts, 16355 and 6, that added together give a palindrome (16361).

The spelling of 163556 in words is "one hundred sixty-three thousand, five hundred fifty-six".