216600638411 has 2 divisors, whose sum is σ = 216600638412. Its totient is φ = 216600638410.

The previous prime is 216600638393. The next prime is 216600638413. The reversal of 216600638411 is 114836006612.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-216600638411 is a prime.

Together with 216600638413, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (216600638413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108300319205 + 108300319206.

It is an arithmetic number, because the mean of its divisors is an integer number (108300319206).

Almost surely, 2^216600638411 is an apocalyptic number.

216600638411 is a deficient number, since it is larger than the sum of its proper divisors (1).

216600638411 is an equidigital number, since it uses as much as digits as its factorization.

216600638411 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 41472, while the sum is 38.

The spelling of 216600638411 in words is "two hundred sixteen billion, six hundred million, six hundred thirty-eight thousand, four hundred eleven".