164368643 has 8 divisors (see below), whose sum is σ = 165986400.
Its totient is φ = 162759168.
The previous prime is 164368613. The next prime is 164368667. The reversal of 164368643 is 346863461.
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 164368643 - 28 = 164368387 is a prime.
It is a super-2 number, since 2×1643686432 = 54034101603322898, which contains 22 as substring.
It is a Duffinian number.
It is a self number, because there is not a number n which added to its sum of digits gives 164368643.
It is not an unprimeable number, because it can be changed into a prime (164368613) 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, 42338 + ... + 46056.
It is an arithmetic number, because the mean of its divisors is an integer number (20748300).
Almost surely, 2164368643 is an apocalyptic number.
164368643 is a deficient number, since it is larger than the sum of its proper divisors (1617757).
164368643 is a wasteful number, since it uses less digits than its factorization.
164368643 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 4141.
The product of its digits is 248832, while the sum is 41.
The square root of 164368643 is about 12820.6334866886.
The cubic root of 164368643 is about 547.7801911610.
The spelling of 164368643 in words is "one hundred sixty-four million, three hundred sixty-eight thousand, six hundred forty-three".