16559994392 has 16 divisors (see below), whose sum is σ = 31889178960. Its totient is φ = 8056213344.

The previous prime is 16559994391. The next prime is 16559994397. The reversal of 16559994392 is 29349995561.

It is a happy number.

It is a Smith number, since the sum of its digits (62) coincides with the sum of the digits of its prime factors.

It is a congruent number.

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

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27972668 + ... + 27973259.

It is an arithmetic number, because the mean of its divisors is an integer number (1993073685).

Almost surely, 2^16559994392 is an apocalyptic number.

It is an amenable number.

16559994392 is a deficient number, since it is larger than the sum of its proper divisors (15329184568).

16559994392 is a wasteful number, since it uses less digits than its factorization.

16559994392 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55945970 (or 55945966 counting only the distinct ones).

The product of its digits is 23619600, while the sum is 62.

The spelling of 16559994392 in words is "sixteen billion, five hundred fifty-nine million, nine hundred ninety-four thousand, three hundred ninety-two".