164432405 has 16 divisors (see below), whose sum is σ = 208980864. Its totient is φ = 123942720.

The previous prime is 164432399. The next prime is 164432419. The reversal of 164432405 is 504234461.

It is not a de Polignac number, because 164432405 - 2¹⁰ = 164431381 is a prime.

It is a super-3 number, since 3×164432405³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2966 + ... + 18375.

It is an arithmetic number, because the mean of its divisors is an integer number (13061304).

Almost surely, 2^164432405 is an apocalyptic number.

It is an amenable number.

164432405 is a deficient number, since it is larger than the sum of its proper divisors (44548459).

164432405 is a wasteful number, since it uses less digits than its factorization.

164432405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21436.

The product of its (nonzero) digits is 11520, while the sum is 29.

The square root of 164432405 is about 12823.1199401706. The cubic root of 164432405 is about 547.8510137634.

Adding to 164432405 its reverse (504234461), we get a palindrome (668666866).

The spelling of 164432405 in words is "one hundred sixty-four million, four hundred thirty-two thousand, four hundred five".