164205645 has 8 divisors (see below), whose sum is σ = 262729056. Its totient is φ = 87576336.

The previous prime is 164205637. The next prime is 164205647. The reversal of 164205645 is 546502461.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 164205645 - 2³ = 164205637 is a prime.

It is a super-3 number, since 3×164205645³ (a number of 26 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164205647) 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 7 ways as a sum of consecutive naturals, for example, 5473507 + ... + 5473536.

It is an arithmetic number, because the mean of its divisors is an integer number (32841132).

Almost surely, 2^164205645 is an apocalyptic number.

164205645 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

164205645 is a deficient number, since it is larger than the sum of its proper divisors (98523411).

164205645 is a wasteful number, since it uses less digits than its factorization.

164205645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10947051.

The product of its (nonzero) digits is 28800, while the sum is 33.

The square root of 164205645 is about 12814.2750477739. The cubic root of 164205645 is about 547.5990604935.

The spelling of 164205645 in words is "one hundred sixty-four million, two hundred five thousand, six hundred forty-five".