16556722699 has 12 divisors (see below), whose sum is σ = 18785771200. Its totient is φ = 14566028400.

The previous prime is 16556722681. The next prime is 16556722723. The reversal of 16556722699 is 99622765561.

It is a de Polignac number, because none of the positive numbers 2^k-16556722699 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16556722649) 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, 2203224 + ... + 2210725.

Almost surely, 2^16556722699 is an apocalyptic number.

16556722699 is a deficient number, since it is larger than the sum of its proper divisors (2229048501).

16556722699 is a wasteful number, since it uses less digits than its factorization.

16556722699 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4414002 (or 4413991 counting only the distinct ones).

The product of its digits is 12247200, while the sum is 58.

The spelling of 16556722699 in words is "sixteen billion, five hundred fifty-six million, seven hundred twenty-two thousand, six hundred ninety-nine".