163664409 has 8 divisors (see below), whose sum is σ = 218282752. Its totient is φ = 109077840.

The previous prime is 163664399. The next prime is 163664419. The reversal of 163664409 is 904466361.

It is an interprime number because it is at equal distance from previous prime (163664399) and next prime (163664419).

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

It is not a de Polignac number, because 163664409 - 2⁵ = 163664377 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (163664419) 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 7 ways as a sum of consecutive naturals, for example, 9639 + ... + 20499.

It is an arithmetic number, because the mean of its divisors is an integer number (27285344).

Almost surely, 2^163664409 is an apocalyptic number.

It is an amenable number.

163664409 is a deficient number, since it is larger than the sum of its proper divisors (54618343).

163664409 is a wasteful number, since it uses less digits than its factorization.

163664409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15887.

The product of its (nonzero) digits is 93312, while the sum is 39.

The square root of 163664409 is about 12793.1391378348. The cubic root of 163664409 is about 546.9967536434.

The spelling of 163664409 in words is "one hundred sixty-three million, six hundred sixty-four thousand, four hundred nine".