164512865 has 8 divisors (see below), whose sum is σ = 215362368. Its totient is φ = 119645680.

The previous prime is 164512861. The next prime is 164512867. The reversal of 164512865 is 568215461.

It is a happy number.

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

It is not a de Polignac number, because 164512865 - 2² = 164512861 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (164512861) 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, 1495517 + ... + 1495626.

It is an arithmetic number, because the mean of its divisors is an integer number (26920296).

Almost surely, 2^164512865 is an apocalyptic number.

It is an amenable number.

164512865 is a deficient number, since it is larger than the sum of its proper divisors (50849503).

164512865 is a wasteful number, since it uses less digits than its factorization.

164512865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2991159.

The product of its digits is 57600, while the sum is 38.

The square root of 164512865 is about 12826.2568584915. The cubic root of 164512865 is about 547.9403572736.

The spelling of 164512865 in words is "one hundred sixty-four million, five hundred twelve thousand, eight hundred sixty-five".