16218441617 has 8 divisors (see below), whose sum is σ = 18536337600. Its totient is φ = 13900789584.

The previous prime is 16218441611. The next prime is 16218441653. The reversal of 16218441617 is 71614481261.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16218441617 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16218441611) 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, 115559 + ... + 213987.

It is an arithmetic number, because the mean of its divisors is an integer number (2317042200).

Almost surely, 2^16218441617 is an apocalyptic number.

It is an amenable number.

16218441617 is a deficient number, since it is larger than the sum of its proper divisors (2317895983).

16218441617 is an equidigital number, since it uses as much as digits as its factorization.

16218441617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121975.

The product of its digits is 64512, while the sum is 41.

The spelling of 16218441617 in words is "sixteen billion, two hundred eighteen million, four hundred forty-one thousand, six hundred seventeen".