16508601009 has 40 divisors (see below), whose sum is σ = 26174585448. Its totient is φ = 10333370880.

The previous prime is 16508600971. The next prime is 16508601029. The reversal of 16508601009 is 90010680561.

It can be written as a sum of positive squares in 4 ways, for example, as 386712225 + 16121888784 = 19665^2 + 126972^2 .

It is not a de Polignac number, because 16508601009 - 2⁷ = 16508600881 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (16508601029) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 565479 + ... + 593955.

Almost surely, 2^16508601009 is an apocalyptic number.

It is an amenable number.

16508601009 is a deficient number, since it is larger than the sum of its proper divisors (9665984439).

16508601009 is a wasteful number, since it uses less digits than its factorization.

16508601009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28927 (or 28918 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 36.

The spelling of 16508601009 in words is "sixteen billion, five hundred eight million, six hundred one thousand, nine".