164855 has 4 divisors (see below), whose sum is σ = 197832. Its totient is φ = 131880.

The previous prime is 164839. The next prime is 164881. The reversal of 164855 is 558461.

It is a happy number.

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

It is not a de Polignac number, because 164855 - 2⁴ = 164839 is a prime.

It is a Duffinian number.

It is a congruent number.

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, 16481 + ... + 16490.

It is an arithmetic number, because the mean of its divisors is an integer number (49458).

2¹⁶⁴⁸⁵⁵ is an apocalyptic number.

164855 is a deficient number, since it is larger than the sum of its proper divisors (32977).

164855 is an equidigital number, since it uses as much as digits as its factorization.

164855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32976.

The product of its digits is 4800, while the sum is 29.

The square root of 164855 is about 406.0233983405. The cubic root of 164855 is about 54.8319942106.

The spelling of 164855 in words is "one hundred sixty-four thousand, eight hundred fifty-five".