16734556999 has 4 divisors (see below), whose sum is σ = 16745292720. Its totient is φ = 16723821280.

The previous prime is 16734556973. The next prime is 16734557009. The reversal of 16734556999 is 99965543761.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 16734556999 - 2²¹ = 16732459847 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 16734556999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16734556099) 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 3 ways as a sum of consecutive naturals, for example, 5365522 + ... + 5368639.

It is an arithmetic number, because the mean of its divisors is an integer number (4186323180).

Almost surely, 2^16734556999 is an apocalyptic number.

16734556999 is a deficient number, since it is larger than the sum of its proper divisors (10735721).

16734556999 is a wasteful number, since it uses less digits than its factorization.

16734556999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10735720.

The product of its digits is 55112400, while the sum is 64.

The spelling of 16734556999 in words is "sixteen billion, seven hundred thirty-four million, five hundred fifty-six thousand, nine hundred ninety-nine".