68826381893 has 2 divisors, whose sum is σ = 68826381894. Its totient is φ = 68826381892.

The previous prime is 68826381829. The next prime is 68826381937. The reversal of 68826381893 is 39818362886.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 66431454049 + 2394927844 = 257743^2 + 48938^2 .

It is a cyclic number.

It is not a de Polignac number, because 68826381893 - 2⁶ = 68826381829 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68826381193) 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, 34413190946 + 34413190947.

It is an arithmetic number, because the mean of its divisors is an integer number (34413190947).

Almost surely, 2^68826381893 is an apocalyptic number.

It is an amenable number.

68826381893 is a deficient number, since it is larger than the sum of its proper divisors (1).

68826381893 is an equidigital number, since it uses as much as digits as its factorization.

68826381893 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23887872, while the sum is 62.

The spelling of 68826381893 in words is "sixty-eight billion, eight hundred twenty-six million, three hundred eighty-one thousand, eight hundred ninety-three".