163444406 has 16 divisors (see below), whose sum is σ = 256478400. Its totient is φ = 78015168.

The previous prime is 163444297. The next prime is 163444451. The reversal of 163444406 is 604444361.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10670 + ... + 20993.

It is an arithmetic number, because the mean of its divisors is an integer number (16029900).

Almost surely, 2^163444406 is an apocalyptic number.

163444406 is a deficient number, since it is larger than the sum of its proper divisors (93033994).

163444406 is a wasteful number, since it uses less digits than its factorization.

163444406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31783.

The product of its (nonzero) digits is 27648, while the sum is 32.

The square root of 163444406 is about 12784.5377702911. The cubic root of 163444406 is about 546.7515468208.

Adding to 163444406 its reverse (604444361), we get a palindrome (767888767).

The spelling of 163444406 in words is "one hundred sixty-three million, four hundred forty-four thousand, four hundred six".