9661141120889 has 2 divisors, whose sum is σ = 9661141120890. Its totient is φ = 9661141120888.

The previous prime is 9661141120843. The next prime is 9661141120921. The reversal of 9661141120889 is 9880211411669.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6380271846400 + 3280869274489 = 2525920^2 + 1811317^2 .

It is a cyclic number.

It is not a de Polignac number, because 9661141120889 - 2¹² = 9661141116793 is a prime.

It is not a weakly prime, because it can be changed into another prime (9661141120819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4830570560444 + 4830570560445.

It is an arithmetic number, because the mean of its divisors is an integer number (4830570560445).

Almost surely, 2^{9661141120889} is an apocalyptic number.

It is an amenable number.

9661141120889 is a deficient number, since it is larger than the sum of its proper divisors (1).

9661141120889 is an equidigital number, since it uses as much as digits as its factorization.

9661141120889 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1492992, while the sum is 56.

The spelling of 9661141120889 in words is "nine trillion, six hundred sixty-one billion, one hundred forty-one million, one hundred twenty thousand, eight hundred eighty-nine".