16639033919 has 4 divisors (see below), whose sum is σ = 16659105960. Its totient is φ = 16618961880.

The previous prime is 16639033909. The next prime is 16639033933. The reversal of 16639033919 is 91933093661.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16639033919 is a prime.

It is a super-2 number, since 2×16639033919² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16639033909) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10034777 + ... + 10036434.

It is an arithmetic number, because the mean of its divisors is an integer number (4164776490).

Almost surely, 2^16639033919 is an apocalyptic number.

16639033919 is a deficient number, since it is larger than the sum of its proper divisors (20072041).

16639033919 is an equidigital number, since it uses as much as digits as its factorization.

16639033919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20072040.

The product of its (nonzero) digits is 708588, while the sum is 50.

The spelling of 16639033919 in words is "sixteen billion, six hundred thirty-nine million, thirty-three thousand, nine hundred nineteen".