16639054009 has 8 divisors (see below), whose sum is σ = 16832194632. Its totient is φ = 16446470400.

The previous prime is 16639054001. The next prime is 16639054039. The reversal of 16639054009 is 90045093661.

It can be written as a sum of positive squares in 4 ways, for example, as 11742973225 + 4896080784 = 108365^2 + 69972^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 16639054009 - 2³ = 16639054001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16639054001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 79014 + ... + 198799.

It is an arithmetic number, because the mean of its divisors is an integer number (2104024329).

Almost surely, 2^16639054009 is an apocalyptic number.

It is an amenable number.

16639054009 is a deficient number, since it is larger than the sum of its proper divisors (193140623).

16639054009 is a wasteful number, since it uses less digits than its factorization.

16639054009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278507.

The product of its (nonzero) digits is 174960, while the sum is 43.

The spelling of 16639054009 in words is "sixteen billion, six hundred thirty-nine million, fifty-four thousand, nine".