16643311244 has 36 divisors (see below), whose sum is σ = 34796821584. Its totient is φ = 6822717792.

The previous prime is 16643311211. The next prime is 16643311247. The reversal of 16643311244 is 44211334661.

It is not an unprimeable number, because it can be changed into a prime (16643311247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 547007 + ... + 576630.

Almost surely, 2^16643311244 is an apocalyptic number.

16643311244 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

16643311244 is an abundant number, since it is smaller than the sum of its proper divisors (18153510340).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16643311244 is a wasteful number, since it uses less digits than its factorization.

16643311244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1123694 (or 1123669 counting only the distinct ones).

The product of its digits is 41472, while the sum is 35.

The spelling of 16643311244 in words is "sixteen billion, six hundred forty-three million, three hundred eleven thousand, two hundred forty-four".