68864488446931 has 2 divisors, whose sum is σ = 68864488446932. Its totient is φ = 68864488446930.

The previous prime is 68864488446883. The next prime is 68864488446947. The reversal of 68864488446931 is 13964488446886.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68864488446931 is a prime.

It is a super-2 number, since 2×68864488446931² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (68864488443931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34432244223465 + 34432244223466.

It is an arithmetic number, because the mean of its divisors is an integer number (34432244223466).

Almost surely, 2^{68864488446931} is an apocalyptic number.

68864488446931 is a deficient number, since it is larger than the sum of its proper divisors (1).

68864488446931 is an equidigital number, since it uses as much as digits as its factorization.

68864488446931 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6115295232, while the sum is 79.

The spelling of 68864488446931 in words is "sixty-eight trillion, eight hundred sixty-four billion, four hundred eighty-eight million, four hundred forty-six thousand, nine hundred thirty-one".