16623647669 has 8 divisors (see below), whose sum is σ = 17167207680. Its totient is φ = 16080544800.

The previous prime is 16623647653. The next prime is 16623647687. The reversal of 16623647669 is 96674632661.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 16623647669 - 2⁴ = 16623647653 is a prime.

It is a super-2 number, since 2×16623647669² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16623647609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39584 + ... + 186585.

It is an arithmetic number, because the mean of its divisors is an integer number (2145900960).

Almost surely, 2^16623647669 is an apocalyptic number.

It is an amenable number.

16623647669 is a deficient number, since it is larger than the sum of its proper divisors (543560011).

16623647669 is a wasteful number, since it uses less digits than its factorization.

16623647669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228571.

The product of its digits is 11757312, while the sum is 56.

The spelling of 16623647669 in words is "sixteen billion, six hundred twenty-three million, six hundred forty-seven thousand, six hundred sixty-nine".