16991439436 has 48 divisors (see below), whose sum is σ = 30661368192. Its totient is φ = 8234956800.

The previous prime is 16991439433. The next prime is 16991439511. The reversal of 16991439436 is 63493419961.

It is a happy number.

16991439436 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (16991439431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9560980 + ... + 9562756.

It is an arithmetic number, because the mean of its divisors is an integer number (638778504).

Almost surely, 2^16991439436 is an apocalyptic number.

It is an amenable number.

16991439436 is a deficient number, since it is larger than the sum of its proper divisors (13669928756).

16991439436 is a wasteful number, since it uses less digits than its factorization.

16991439436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2290 (or 2288 counting only the distinct ones).

The product of its digits is 3779136, while the sum is 55.

The spelling of 16991439436 in words is "sixteen billion, nine hundred ninety-one million, four hundred thirty-nine thousand, four hundred thirty-six".