688216611739 has 2 divisors, whose sum is σ = 688216611740. Its totient is φ = 688216611738.

The previous prime is 688216611713. The next prime is 688216611743. The reversal of 688216611739 is 937116612886.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 688216611739 - 2⁹ = 688216611227 is a prime.

It is not a weakly prime, because it can be changed into another prime (688216611749) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 344108305869 + 344108305870.

It is an arithmetic number, because the mean of its divisors is an integer number (344108305870).

Almost surely, 2^688216611739 is an apocalyptic number.

688216611739 is a deficient number, since it is larger than the sum of its proper divisors (1).

688216611739 is an equidigital number, since it uses as much as digits as its factorization.

688216611739 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5225472, while the sum is 58.

The spelling of 688216611739 in words is "six hundred eighty-eight billion, two hundred sixteen million, six hundred eleven thousand, seven hundred thirty-nine".