16509842004 has 24 divisors (see below), whose sum is σ = 38526096448. Its totient is φ = 5502833280.

The previous prime is 16509841981. The next prime is 16509842059. The reversal of 16509842004 is 40024890561.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 119964 + ... + 217740.

Almost surely, 2^16509842004 is an apocalyptic number.

It is an amenable number.

16509842004 is an abundant number, since it is smaller than the sum of its proper divisors (22016254444).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16509842004 is a wasteful number, since it uses less digits than its factorization.

16509842004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111855 (or 111853 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 39.

The spelling of 16509842004 in words is "sixteen billion, five hundred nine million, eight hundred forty-two thousand, four".