164505817 has 16 divisors (see below), whose sum is σ = 193665024. Its totient is φ = 136800000.

The previous prime is 164505791. The next prime is 164505827. The reversal of 164505817 is 718505461.

164505817 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-164505817 is a prime.

It is not an unprimeable number, because it can be changed into a prime (164505827) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 53317 + ... + 56317.

It is an arithmetic number, because the mean of its divisors is an integer number (12104064).

Almost surely, 2^164505817 is an apocalyptic number.

It is an amenable number.

164505817 is a deficient number, since it is larger than the sum of its proper divisors (29159207).

164505817 is a wasteful number, since it uses less digits than its factorization.

164505817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3240.

The product of its (nonzero) digits is 33600, while the sum is 37.

The square root of 164505817 is about 12825.9821066459. The cubic root of 164505817 is about 547.9325322751.

The spelling of 164505817 in words is "one hundred sixty-four million, five hundred five thousand, eight hundred seventeen".