164444563 has 8 divisors (see below), whose sum is σ = 177322320. Its totient is φ = 151989120.

The previous prime is 164444557. The next prime is 164444569. The reversal of 164444563 is 365444461.

It is an interprime number because it is at equal distance from previous prime (164444557) and next prime (164444569).

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

It is a cyclic number.

It is not a de Polignac number, because 164444563 - 2²¹ = 162347411 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (164444569) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 104770 + ... + 106327.

It is an arithmetic number, because the mean of its divisors is an integer number (22165290).

Almost surely, 2^164444563 is an apocalyptic number.

164444563 is a deficient number, since it is larger than the sum of its proper divisors (12877757).

164444563 is a wasteful number, since it uses less digits than its factorization.

164444563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211157.

The product of its digits is 138240, while the sum is 37.

The square root of 164444563 is about 12823.5939970041. The cubic root of 164444563 is about 547.8645159853.

The spelling of 164444563 in words is "one hundred sixty-four million, four hundred forty-four thousand, five hundred sixty-three".