164221476318 has 48 divisors (see below), whose sum is σ = 368189577600. Its totient is φ = 52845073920.

The previous prime is 164221476277. The next prime is 164221476359. The reversal of 164221476318 is 813674122461.

164221476318 is a `hidden beast` number, since 1 + 6 + 4 + 2 + 2 + 1 + 4 + 7 + 631 + 8 = 666.

It is an interprime number because it is at equal distance from previous prime (164221476277) and next prime (164221476359).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 131563 + ... + 588006.

It is an arithmetic number, because the mean of its divisors is an integer number (7670616200).

Almost surely, 2^164221476318 is an apocalyptic number.

164221476318 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

164221476318 is an abundant number, since it is smaller than the sum of its proper divisors (203968101282).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

164221476318 is a wasteful number, since it uses less digits than its factorization.

164221476318 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 720017 (or 720014 counting only the distinct ones).

The product of its digits is 387072, while the sum is 45.

Adding to 164221476318 its reverse (813674122461), we get a palindrome (977895598779).

The spelling of 164221476318 in words is "one hundred sixty-four billion, two hundred twenty-one million, four hundred seventy-six thousand, three hundred eighteen".