68840820143 has 2 divisors, whose sum is σ = 68840820144. Its totient is φ = 68840820142.

The previous prime is 68840820101. The next prime is 68840820149. The reversal of 68840820143 is 34102804886.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 68840820143 - 2¹⁰ = 68840819119 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 68840820094 and 68840820103.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68840820149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34420410071 + 34420410072.

It is an arithmetic number, because the mean of its divisors is an integer number (34420410072).

Almost surely, 2^68840820143 is an apocalyptic number.

68840820143 is a deficient number, since it is larger than the sum of its proper divisors (1).

68840820143 is an equidigital number, since it uses as much as digits as its factorization.

68840820143 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 294912, while the sum is 44.

The spelling of 68840820143 in words is "sixty-eight billion, eight hundred forty million, eight hundred twenty thousand, one hundred forty-three".