16805383639 has 4 divisors (see below), whose sum is σ = 18333145800. Its totient is φ = 15277621480.

The previous prime is 16805383633. The next prime is 16805383657. The reversal of 16805383639 is 93638350861.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 16805383639 - 2³ = 16805383631 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16805383631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 763881064 + ... + 763881085.

It is an arithmetic number, because the mean of its divisors is an integer number (4583286450).

Almost surely, 2^16805383639 is an apocalyptic number.

16805383639 is a deficient number, since it is larger than the sum of its proper divisors (1527762161).

16805383639 is a wasteful number, since it uses less digits than its factorization.

16805383639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1527762160.

The product of its (nonzero) digits is 2799360, while the sum is 52.

The spelling of 16805383639 in words is "sixteen billion, eight hundred five million, three hundred eighty-three thousand, six hundred thirty-nine".