68821803767839 has 2 divisors, whose sum is σ = 68821803767840. Its totient is φ = 68821803767838.

The previous prime is 68821803767803. The next prime is 68821803767851. The reversal of 68821803767839 is 93876730812886.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 68821803767839 - 2²⁷ = 68821669550111 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68821803767539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34410901883919 + 34410901883920.

It is an arithmetic number, because the mean of its divisors is an integer number (34410901883920).

Almost surely, 2^{68821803767839} is an apocalyptic number.

68821803767839 is a deficient number, since it is larger than the sum of its proper divisors (1).

68821803767839 is an equidigital number, since it uses as much as digits as its factorization.

68821803767839 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1170505728, while the sum is 76.

The spelling of 68821803767839 in words is "sixty-eight trillion, eight hundred twenty-one billion, eight hundred three million, seven hundred sixty-seven thousand, eight hundred thirty-nine".