67368194242991 has 2 divisors, whose sum is σ = 67368194242992. Its totient is φ = 67368194242990.

The previous prime is 67368194242967. The next prime is 67368194243039. The reversal of 67368194242991 is 19924249186376.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 67368194242991 - 2²⁶ = 67368127134127 is a prime.

It is a super-2 number, since 2×67368194242991² (a number of 28 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (67368194242691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33684097121495 + 33684097121496.

It is an arithmetic number, because the mean of its divisors is an integer number (33684097121496).

Almost surely, 2^{67368194242991} is an apocalyptic number.

67368194242991 is a deficient number, since it is larger than the sum of its proper divisors (1).

67368194242991 is an equidigital number, since it uses as much as digits as its factorization.

67368194242991 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 282175488, while the sum is 71.

The spelling of 67368194242991 in words is "sixty-seven trillion, three hundred sixty-eight billion, one hundred ninety-four million, two hundred forty-two thousand, nine hundred ninety-one".