16504509859 has 8 divisors (see below), whose sum is σ = 16810038000. Its totient is φ = 16201650432.

The previous prime is 16504509851. The next prime is 16504509869. The reversal of 16504509859 is 95890540561.

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 16504509859 - 2³ = 16504509851 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16504509851) 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 7 ways as a sum of consecutive naturals, for example, 654694 + ... + 679435.

It is an arithmetic number, because the mean of its divisors is an integer number (2101254750).

Almost surely, 2^16504509859 is an apocalyptic number.

16504509859 is a deficient number, since it is larger than the sum of its proper divisors (305528141).

16504509859 is a wasteful number, since it uses less digits than its factorization.

16504509859 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1334357.

The product of its (nonzero) digits is 1944000, while the sum is 52.

The spelling of 16504509859 in words is "sixteen billion, five hundred four million, five hundred nine thousand, eight hundred fifty-nine".