164442565 has 8 divisors (see below), whose sum is σ = 225521280. Its totient is φ = 112760592.

The previous prime is 164442559. The next prime is 164442583. The reversal of 164442565 is 565244461.

164442565 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 164442565 - 2⁵ = 164442533 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2349145 + ... + 2349214.

It is an arithmetic number, because the mean of its divisors is an integer number (28190160).

Almost surely, 2^164442565 is an apocalyptic number.

It is an amenable number.

164442565 is a deficient number, since it is larger than the sum of its proper divisors (61078715).

164442565 is an equidigital number, since it uses as much as digits as its factorization.

164442565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4698371.

The product of its digits is 115200, while the sum is 37.

The square root of 164442565 is about 12823.5160934901. The cubic root of 164442565 is about 547.8622971266.

The spelling of 164442565 in words is "one hundred sixty-four million, four hundred forty-two thousand, five hundred sixty-five".