164445663 has 4 divisors (see below), whose sum is σ = 219260888. Its totient is φ = 109630440.

The previous prime is 164445661. The next prime is 164445667. The reversal of 164445663 is 366544461.

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

It is not a de Polignac number, because 164445663 - 2¹ = 164445661 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164445661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27407608 + ... + 27407613.

It is an arithmetic number, because the mean of its divisors is an integer number (54815222).

Almost surely, 2^164445663 is an apocalyptic number.

164445663 is a deficient number, since it is larger than the sum of its proper divisors (54815225).

164445663 is an equidigital number, since it uses as much as digits as its factorization.

164445663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54815224.

The product of its digits is 207360, while the sum is 39.

The square root of 164445663 is about 12823.6368866246. The cubic root of 164445663 is about 547.8657375715.

The spelling of 164445663 in words is "one hundred sixty-four million, four hundred forty-five thousand, six hundred sixty-three".