9881646589349 has 2 divisors, whose sum is σ = 9881646589350. Its totient is φ = 9881646589348.

The previous prime is 9881646589333. The next prime is 9881646589357. The reversal of 9881646589349 is 9439856461889.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9301127550625 + 580519038724 = 3049775^2 + 761918^2 .

It is a cyclic number.

It is not a de Polignac number, because 9881646589349 - 2⁴ = 9881646589333 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9881646589369) 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, 4940823294674 + 4940823294675.

It is an arithmetic number, because the mean of its divisors is an integer number (4940823294675).

Almost surely, 2^{9881646589349} is an apocalyptic number.

It is an amenable number.

9881646589349 is a deficient number, since it is larger than the sum of its proper divisors (1).

9881646589349 is an equidigital number, since it uses as much as digits as its factorization.

9881646589349 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3224862720, while the sum is 80.

The spelling of 9881646589349 in words is "nine trillion, eight hundred eighty-one billion, six hundred forty-six million, five hundred eighty-nine thousand, three hundred forty-nine".