16636221323 has 2 divisors, whose sum is σ = 16636221324. Its totient is φ = 16636221322.

The previous prime is 16636221319. The next prime is 16636221383. The reversal of 16636221323 is 32312263661.

It is a weak prime.

It is an emirp because it is prime and its reverse (32312263661) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16636221323 - 2² = 16636221319 is a prime.

It is not a weakly prime, because it can be changed into another prime (16636221313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8318110661 + 8318110662.

It is an arithmetic number, because the mean of its divisors is an integer number (8318110662).

Almost surely, 2^16636221323 is an apocalyptic number.

16636221323 is a deficient number, since it is larger than the sum of its proper divisors (1).

16636221323 is an equidigital number, since it uses as much as digits as its factorization.

16636221323 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 46656, while the sum is 35.

Adding to 16636221323 its reverse (32312263661), we get a palindrome (48948484984).

The spelling of 16636221323 in words is "sixteen billion, six hundred thirty-six million, two hundred twenty-one thousand, three hundred twenty-three".