164538372 has 12 divisors (see below), whose sum is σ = 383922896. Its totient is φ = 54846120.

The previous prime is 164538337. The next prime is 164538377. The reversal of 164538372 is 273835461.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 164538372.

It is not an unprimeable number, because it can be changed into a prime (164538377) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6855754 + ... + 6855777.

Almost surely, 2^164538372 is an apocalyptic number.

164538372 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

164538372 is an abundant number, since it is smaller than the sum of its proper divisors (219384524).

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

164538372 is a wasteful number, since it uses less digits than its factorization.

164538372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13711538 (or 13711536 counting only the distinct ones).

The product of its digits is 120960, while the sum is 39.

The square root of 164538372 is about 12827.2511474595. The cubic root of 164538372 is about 547.9686743953.

The spelling of 164538372 in words is "one hundred sixty-four million, five hundred thirty-eight thousand, three hundred seventy-two".