68027816551 has 2 divisors, whose sum is σ = 68027816552. Its totient is φ = 68027816550.

The previous prime is 68027816513. The next prime is 68027816567. The reversal of 68027816551 is 15561872086.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68027816551 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 68027816495 and 68027816504.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68027816251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34013908275 + 34013908276.

It is an arithmetic number, because the mean of its divisors is an integer number (34013908276).

Almost surely, 2^68027816551 is an apocalyptic number.

68027816551 is a deficient number, since it is larger than the sum of its proper divisors (1).

68027816551 is an equidigital number, since it uses as much as digits as its factorization.

68027816551 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 806400, while the sum is 49.

The spelling of 68027816551 in words is "sixty-eight billion, twenty-seven million, eight hundred sixteen thousand, five hundred fifty-one".