164720318 has 16 divisors (see below), whose sum is σ = 284180064. Its totient is φ = 70143840.

The previous prime is 164720287. The next prime is 164720321. The reversal of 164720318 is 813027461.

It is a super-2 number, since 2×164720318² = 54265566324042248, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 35273 + ... + 39668.

It is an arithmetic number, because the mean of its divisors is an integer number (17761254).

Almost surely, 2^164720318 is an apocalyptic number.

164720318 is a deficient number, since it is larger than the sum of its proper divisors (119459746).

164720318 is a wasteful number, since it uses less digits than its factorization.

164720318 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75107.

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 164720318 is about 12834.3413543508. The cubic root of 164720318 is about 548.1705806542.

Adding to 164720318 its reverse (813027461), we get a palindrome (977747779).

The spelling of 164720318 in words is "one hundred sixty-four million, seven hundred twenty thousand, three hundred eighteen".