16648438211 has 4 divisors (see below), whose sum is σ = 16652664432. Its totient is φ = 16644211992.

The previous prime is 16648438207. The next prime is 16648438253. The reversal of 16648438211 is 11283484661.

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

It is a cyclic number.

It is not a de Polignac number, because 16648438211 - 2² = 16648438207 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16648438271) 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, 2107196 + ... + 2115081.

It is an arithmetic number, because the mean of its divisors is an integer number (4163166108).

Almost surely, 2^16648438211 is an apocalyptic number.

16648438211 is a deficient number, since it is larger than the sum of its proper divisors (4226221).

16648438211 is an equidigital number, since it uses as much as digits as its factorization.

16648438211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4226220.

The product of its digits is 221184, while the sum is 44.

The spelling of 16648438211 in words is "sixteen billion, six hundred forty-eight million, four hundred thirty-eight thousand, two hundred eleven".