68289350089021 has 2 divisors, whose sum is σ = 68289350089022. Its totient is φ = 68289350089020.

The previous prime is 68289350088959. The next prime is 68289350089043. The reversal of 68289350089021 is 12098005398286.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 36613221384996 + 31676128704025 = 6050886^2 + 5628155^2 .

It is a cyclic number.

It is not a de Polignac number, because 68289350089021 - 2⁷ = 68289350088893 is a prime.

It is a super-3 number, since 3×68289350089021³ (a number of 42 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68289350039021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34144675044510 + 34144675044511.

It is an arithmetic number, because the mean of its divisors is an integer number (34144675044511).

Almost surely, 2^{68289350089021} is an apocalyptic number.

It is an amenable number.

68289350089021 is a deficient number, since it is larger than the sum of its proper divisors (1).

68289350089021 is an equidigital number, since it uses as much as digits as its factorization.

68289350089021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14929920, while the sum is 61.

The spelling of 68289350089021 in words is "sixty-eight trillion, two hundred eighty-nine billion, three hundred fifty million, eighty-nine thousand, twenty-one".