16749844669 has 4 divisors (see below), whose sum is σ = 16751415996. Its totient is φ = 16748273344.

The previous prime is 16749844633. The next prime is 16749844717. The reversal of 16749844669 is 96644894761.

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

It can be written as a sum of positive squares in 2 ways, for example, as 3157316100 + 13592528569 = 56190^2 + 116587^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16749844669 is a prime.

It is a super-2 number, since 2×16749844669² (a number of 21 digits) contains 22 as substring.

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 16749844669.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16749844469) 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, 769564 + ... + 791029.

It is an arithmetic number, because the mean of its divisors is an integer number (4187853999).

Almost surely, 2^16749844669 is an apocalyptic number.

It is an amenable number.

16749844669 is a deficient number, since it is larger than the sum of its proper divisors (1571327).

16749844669 is a wasteful number, since it uses less digits than its factorization.

16749844669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1571326.

The product of its digits is 62705664, while the sum is 64.

The spelling of 16749844669 in words is "sixteen billion, seven hundred forty-nine million, eight hundred forty-four thousand, six hundred sixty-nine".