208620748811 has 2 divisors, whose sum is σ = 208620748812. Its totient is φ = 208620748810.

The previous prime is 208620748783. The next prime is 208620748823. The reversal of 208620748811 is 118847026802.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 208620748811 - 2¹⁰ = 208620747787 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (208620748841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 104310374405 + 104310374406.

It is an arithmetic number, because the mean of its divisors is an integer number (104310374406).

Almost surely, 2^208620748811 is an apocalyptic number.

208620748811 is a deficient number, since it is larger than the sum of its proper divisors (1).

208620748811 is an equidigital number, since it uses as much as digits as its factorization.

208620748811 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 344064, while the sum is 47.

The spelling of 208620748811 in words is "two hundred eight billion, six hundred twenty million, seven hundred forty-eight thousand, eight hundred eleven".