164205161 has 4 divisors (see below), whose sum is σ = 164638800. Its totient is φ = 163771524.

The previous prime is 164205131. The next prime is 164205187. The reversal of 164205161 is 161502461.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 161502461 = 2741 ⋅58921.

It is a cyclic number.

It is not a de Polignac number, because 164205161 - 2¹⁴ = 164188777 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 164205161.

It is not an unprimeable number, because it can be changed into a prime (164205131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 216251 + ... + 217008.

It is an arithmetic number, because the mean of its divisors is an integer number (41159700).

Almost surely, 2^164205161 is an apocalyptic number.

It is an amenable number.

164205161 is a deficient number, since it is larger than the sum of its proper divisors (433639).

164205161 is an equidigital number, since it uses as much as digits as its factorization.

164205161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 433638.

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 164205161 is about 12814.2561625714. The cubic root of 164205161 is about 547.5985224726.

The spelling of 164205161 in words is "one hundred sixty-four million, two hundred five thousand, one hundred sixty-one".