164218636 has 6 divisors (see below), whose sum is σ = 287382620. Its totient is φ = 82109316.

The previous prime is 164218601. The next prime is 164218651. The reversal of 164218636 is 636812461.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 164218595 and 164218604.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20527326 + ... + 20527333.

Almost surely, 2^164218636 is an apocalyptic number.

It is an amenable number.

164218636 is a deficient number, since it is larger than the sum of its proper divisors (123163984).

164218636 is a wasteful number, since it uses less digits than its factorization.

164218636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41054663 (or 41054661 counting only the distinct ones).

The product of its digits is 41472, while the sum is 37.

The square root of 164218636 is about 12814.7819333768. The cubic root of 164218636 is about 547.6135010686.

The spelling of 164218636 in words is "one hundred sixty-four million, two hundred eighteen thousand, six hundred thirty-six".