164404605 has 16 divisors (see below), whose sum is σ = 263983680. Its totient is φ = 87370368.

The previous prime is 164404601. The next prime is 164404631. The reversal of 164404605 is 506404461.

It is not a de Polignac number, because 164404605 - 2² = 164404601 is a prime.

It is a super-3 number, since 3×164404605³ (a number of 26 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164404601) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 15120 + ... + 23609.

It is an arithmetic number, because the mean of its divisors is an integer number (16498980).

Almost surely, 2^164404605 is an apocalyptic number.

164404605 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

164404605 is a deficient number, since it is larger than the sum of its proper divisors (99579075).

164404605 is a wasteful number, since it uses less digits than its factorization.

164404605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39020.

The product of its (nonzero) digits is 11520, while the sum is 30.

The square root of 164404605 is about 12822.0359147836. The cubic root of 164404605 is about 547.8201376179.

The spelling of 164404605 in words is "one hundred sixty-four million, four hundred four thousand, six hundred five".