163456 has 16 divisors (see below), whose sum is σ = 325890. Its totient is φ = 81664.

The previous prime is 163433. The next prime is 163469. The reversal of 163456 is 654361.

It can be written as a sum of positive squares in only one way, i.e., 129600 + 33856 = 360^2 + 184^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is an alternating number because its digits alternate between odd and even.

It is a self number, because there is not a number n which added to its sum of digits gives 163456.

It is an unprimeable number.

163456 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 511 + ... + 766.

2¹⁶³⁴⁵⁶ is an apocalyptic number.

163456 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

163456 is the 256-th heptagonal number.

It is an amenable number.

163456 is a deficient number, since it is larger than the sum of its proper divisors (162434).

163456 is an equidigital number, since it uses as much as digits as its factorization.

163456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1291 (or 1279 counting only the distinct ones).

The product of its digits is 2160, while the sum is 25.

The square root of 163456 is about 404.2969205918. The cubic root of 163456 is about 54.6764474535.

The spelling of 163456 in words is "one hundred sixty-three thousand, four hundred fifty-six".