688846502588399 has 2 divisors, whose sum is σ = 688846502588400. Its totient is φ = 688846502588398.

The previous prime is 688846502588389. The next prime is 688846502588423. The reversal of 688846502588399 is 993885205648886.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-688846502588399 is a prime.

It is a Sophie Germain prime.

It is a Lucas number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (688846502588389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 344423251294199 + 344423251294200.

It is an arithmetic number, because the mean of its divisors is an integer number (344423251294200).

Almost surely, 2^{688846502588399} is an apocalyptic number.

688846502588399 is a deficient number, since it is larger than the sum of its proper divisors (1).

688846502588399 is an equidigital number, since it uses as much as digits as its factorization.

688846502588399 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 57330892800, while the sum is 89.

The spelling of 688846502588399 in words is "six hundred eighty-eight trillion, eight hundred forty-six billion, five hundred two million, five hundred eighty-eight thousand, three hundred ninety-nine".