164538406 has 8 divisors (see below), whose sum is σ = 248751360. Its totient is φ = 81621288.

The previous prime is 164538403. The next prime is 164538449. The reversal of 164538406 is 604835461.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164538401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 323641 + ... + 324148.

It is an arithmetic number, because the mean of its divisors is an integer number (31093920).

Almost surely, 2^164538406 is an apocalyptic number.

164538406 is a deficient number, since it is larger than the sum of its proper divisors (84212954).

164538406 is a wasteful number, since it uses less digits than its factorization.

164538406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 647918.

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

The square root of 164538406 is about 12827.2524727628. The cubic root of 164538406 is about 547.9687121391.

The spelling of 164538406 in words is "one hundred sixty-four million, five hundred thirty-eight thousand, four hundred six".