164561646 has 8 divisors (see below), whose sum is σ = 329123304. Its totient is φ = 54853880.

The previous prime is 164561611. The next prime is 164561687. The reversal of 164561646 is 646165461.

It is a happy number.

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

164561646 is an admirable number.

It is a Curzon number.

It is a congruent 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, 13713465 + ... + 13713476.

It is an arithmetic number, because the mean of its divisors is an integer number (41140413).

Almost surely, 2^164561646 is an apocalyptic number.

164561646 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

164561646 is a wasteful number, since it uses less digits than its factorization.

164561646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27426946.

The product of its digits is 103680, while the sum is 39.

The square root of 164561646 is about 12828.1583245609. The cubic root of 164561646 is about 547.9945099526.

The spelling of 164561646 in words is "one hundred sixty-four million, five hundred sixty-one thousand, six hundred forty-six".