16509337803 has 48 divisors (see below), whose sum is σ = 28162457856. Its totient is φ = 9122414400.

The previous prime is 16509337787. The next prime is 16509337811. The reversal of 16509337803 is 30873390561.

It is not a de Polignac number, because 16509337803 - 2⁴ = 16509337787 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16509337843) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 358228 + ... + 401678.

It is an arithmetic number, because the mean of its divisors is an integer number (586717872).

Almost surely, 2^16509337803 is an apocalyptic number.

16509337803 is a deficient number, since it is larger than the sum of its proper divisors (11653120053).

16509337803 is a wasteful number, since it uses less digits than its factorization.

16509337803 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43664 (or 43661 counting only the distinct ones).

The product of its (nonzero) digits is 408240, while the sum is 45.

The spelling of 16509337803 in words is "sixteen billion, five hundred nine million, three hundred thirty-seven thousand, eight hundred three".