16423156209 has 8 divisors (see below), whose sum is σ = 22256517952. Its totient is φ = 10769282640.

The previous prime is 16423156181. The next prime is 16423156213. The reversal of 16423156209 is 90265132461.

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

It is not a de Polignac number, because 16423156209 - 2⁷ = 16423156081 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (16423156249) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44871829 + ... + 44872194.

It is an arithmetic number, because the mean of its divisors is an integer number (2782064744).

Almost surely, 2^16423156209 is an apocalyptic number.

It is an amenable number.

16423156209 is a deficient number, since it is larger than the sum of its proper divisors (5833361743).

16423156209 is an equidigital number, since it uses as much as digits as its factorization.

16423156209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89744087.

The product of its (nonzero) digits is 77760, while the sum is 39.

The spelling of 16423156209 in words is "sixteen billion, four hundred twenty-three million, one hundred fifty-six thousand, two hundred nine".