164518823 has 12 divisors (see below), whose sum is σ = 193141080. Its totient is φ = 139717872.

The previous prime is 164518787. The next prime is 164518897. The reversal of 164518823 is 328815461.

It is not a de Polignac number, because 164518823 - 2⁶ = 164518759 is a prime.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164518223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10061 + ... + 20742.

It is an arithmetic number, because the mean of its divisors is an integer number (16095090).

Almost surely, 2^164518823 is an apocalyptic number.

164518823 is a deficient number, since it is larger than the sum of its proper divisors (28622257).

164518823 is a wasteful number, since it uses less digits than its factorization.

164518823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30926 (or 30919 counting only the distinct ones).

The product of its digits is 46080, while the sum is 38.

The square root of 164518823 is about 12826.4891143290. The cubic root of 164518823 is about 547.9469719321.

The spelling of 164518823 in words is "one hundred sixty-four million, five hundred eighteen thousand, eight hundred twenty-three".