164840165 has 12 divisors (see below), whose sum is σ = 230103756. Its totient is φ = 113033088.

The previous prime is 164840161. The next prime is 164840171. The reversal of 164840165 is 561048461.

164840165 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 57365476 + 107474689 = 7574^2 + 10367^2 .

It is not a de Polignac number, because 164840165 - 2² = 164840161 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164840161) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 336164 + ... + 336653.

It is an arithmetic number, because the mean of its divisors is an integer number (19175313).

Almost surely, 2^164840165 is an apocalyptic number.

It is an amenable number.

164840165 is a deficient number, since it is larger than the sum of its proper divisors (65263591).

164840165 is an equidigital number, since it uses as much as digits as its factorization.

164840165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 672836 (or 672829 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 35.

The square root of 164840165 is about 12839.0095022942. The cubic root of 164840165 is about 548.3034941763.

The spelling of 164840165 in words is "one hundred sixty-four million, eight hundred forty thousand, one hundred sixty-five".