164401405 has 16 divisors (see below), whose sum is σ = 229163904. Its totient is φ = 110882880.

The previous prime is 164401403. The next prime is 164401429. The reversal of 164401405 is 504104461.

It is not a de Polignac number, because 164401405 - 2¹ = 164401403 is a prime.

It is a super-3 number, since 3×164401405³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 164401405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164401403) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36367 + ... + 40636.

It is an arithmetic number, because the mean of its divisors is an integer number (14322744).

Almost surely, 2^164401405 is an apocalyptic number.

It is an amenable number.

164401405 is a deficient number, since it is larger than the sum of its proper divisors (64762499).

164401405 is an equidigital number, since it uses as much as digits as its factorization.

164401405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77076.

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 164401405 is about 12821.9111290010. The cubic root of 164401405 is about 547.8165833059.

Adding to 164401405 its reverse (504104461), we get a palindrome (668505866).

The spelling of 164401405 in words is "one hundred sixty-four million, four hundred one thousand, four hundred five".