16646317617 has 8 divisors (see below), whose sum is σ = 22217673024. Its totient is φ = 11086253648.

The previous prime is 16646317603. The next prime is 16646317621. The reversal of 16646317617 is 71671364661.

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 16646317617 - 2⁸ = 16646317361 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16646317417) 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, 2819418 + ... + 2825315.

It is an arithmetic number, because the mean of its divisors is an integer number (2777209128).

Almost surely, 2^16646317617 is an apocalyptic number.

It is an amenable number.

16646317617 is a deficient number, since it is larger than the sum of its proper divisors (5571355407).

16646317617 is an equidigital number, since it uses as much as digits as its factorization.

16646317617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5645719.

The product of its digits is 762048, while the sum is 48.

The spelling of 16646317617 in words is "sixteen billion, six hundred forty-six million, three hundred seventeen thousand, six hundred seventeen".