164555 has 4 divisors (see below), whose sum is σ = 197472. Its totient is φ = 131640.

The previous prime is 164531. The next prime is 164569. The reversal of 164555 is 555461.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 164555 - 2⁸ = 164299 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16451 + ... + 16460.

It is an arithmetic number, because the mean of its divisors is an integer number (49368).

2¹⁶⁴⁵⁵⁵ is an apocalyptic number.

164555 is a deficient number, since it is larger than the sum of its proper divisors (32917).

164555 is an equidigital number, since it uses as much as digits as its factorization.

164555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32916.

The product of its digits is 3000, while the sum is 26.

The square root of 164555 is about 405.6537932770. The cubic root of 164555 is about 54.7987132736.

The spelling of 164555 in words is "one hundred sixty-four thousand, five hundred fifty-five".