16519983517 has 16 divisors (see below), whose sum is σ = 17347991040. Its totient is φ = 15712869888.

The previous prime is 16519983511. The next prime is 16519983521. The reversal of 16519983517 is 71538991561.

It is a cyclic number.

It is not a de Polignac number, because 16519983517 - 2¹¹ = 16519981469 is a prime.

It is a Duffinian number.

Its product of digits (2041200) is a multiple of the sum of its prime divisors (11340).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16519983511) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1592973 + ... + 1603309.

It is an arithmetic number, because the mean of its divisors is an integer number (1084249440).

Almost surely, 2^16519983517 is an apocalyptic number.

It is an amenable number.

16519983517 is a deficient number, since it is larger than the sum of its proper divisors (828007523).

16519983517 is a wasteful number, since it uses less digits than its factorization.

16519983517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11340.

The product of its digits is 2041200, while the sum is 55.

The spelling of 16519983517 in words is "sixteen billion, five hundred nineteen million, nine hundred eighty-three thousand, five hundred seventeen".