16559994393 has 12 divisors (see below), whose sum is σ = 23923783728. Its totient is φ = 11038246200.

The previous prime is 16559994391. The next prime is 16559994397. The reversal of 16559994393 is 39349995561.

16559994393 is a `hidden beast` number, since 1 + 6 + 5 + 599 + 9 + 4 + 39 + 3 = 666.

It is not a de Polignac number, because 16559994393 - 2¹ = 16559994391 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16559994393.

It is not an unprimeable number, because it can be changed into a prime (16559994391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 84555 + ... + 200672.

It is an arithmetic number, because the mean of its divisors is an integer number (1993648644).

Almost surely, 2^16559994393 is an apocalyptic number.

It is an amenable number.

16559994393 is a deficient number, since it is larger than the sum of its proper divisors (7363789335).

16559994393 is a wasteful number, since it uses less digits than its factorization.

16559994393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 291684 (or 291681 counting only the distinct ones).

The product of its digits is 35429400, while the sum is 63.

The spelling of 16559994393 in words is "sixteen billion, five hundred fifty-nine million, nine hundred ninety-four thousand, three hundred ninety-three".