68888682091 has 2 divisors, whose sum is σ = 68888682092. Its totient is φ = 68888682090.

The previous prime is 68888682041. The next prime is 68888682097. The reversal of 68888682091 is 19028688886.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 68888682091 - 2¹⁹ = 68888157803 is a prime.

It is not a weakly prime, because it can be changed into another prime (68888682097) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34444341045 + 34444341046.

It is an arithmetic number, because the mean of its divisors is an integer number (34444341046).

Almost surely, 2^68888682091 is an apocalyptic number.

68888682091 is a deficient number, since it is larger than the sum of its proper divisors (1).

68888682091 is an equidigital number, since it uses as much as digits as its factorization.

68888682091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21233664, while the sum is 64.

The spelling of 68888682091 in words is "sixty-eight billion, eight hundred eighty-eight million, six hundred eighty-two thousand, ninety-one".