164223658 has 4 divisors (see below), whose sum is σ = 246335490. Its totient is φ = 82111828.

The previous prime is 164223629. The next prime is 164223673. The reversal of 164223658 is 856322461.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 157427209 + 6796449 = 12547^2 + 2607^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41055913 + ... + 41055916.

Almost surely, 2^164223658 is an apocalyptic number.

164223658 is a deficient number, since it is larger than the sum of its proper divisors (82111832).

164223658 is an equidigital number, since it uses as much as digits as its factorization.

164223658 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82111831.

The product of its digits is 69120, while the sum is 37.

The square root of 164223658 is about 12814.9778774682. The cubic root of 164223658 is about 547.6190832344.

The spelling of 164223658 in words is "one hundred sixty-four million, two hundred twenty-three thousand, six hundred fifty-eight".