16643440443106 has 32 divisors (see below), whose sum is σ = 26628033078720. Its totient is φ = 7774632915456.

The previous prime is 16643440443067. The next prime is 16643440443107. The reversal of 16643440443106 is 60134404434661.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (16643440443107) 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, 101178081 + ... + 101342443.

It is an arithmetic number, because the mean of its divisors is an integer number (832126033710).

Almost surely, 2^{16643440443106} is an apocalyptic number.

16643440443106 is a deficient number, since it is larger than the sum of its proper divisors (9984592635614).

16643440443106 is a wasteful number, since it uses less digits than its factorization.

16643440443106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186258.

The product of its (nonzero) digits is 1990656, while the sum is 46.

Adding to 16643440443106 its reverse (60134404434661), we get a palindrome (76777844877767).

The spelling of 16643440443106 in words is "sixteen trillion, six hundred forty-three billion, four hundred forty million, four hundred forty-three thousand, one hundred six".