9888765444361 has 2 divisors, whose sum is σ = 9888765444362. Its totient is φ = 9888765444360.

The previous prime is 9888765444347. The next prime is 9888765444443. The reversal of 9888765444361 is 1634445678889.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7099133936400 + 2789631507961 = 2664420^2 + 1670219^2 .

It is a cyclic number.

It is not a de Polignac number, because 9888765444361 - 2⁹ = 9888765443849 is a prime.

It is not a weakly prime, because it can be changed into another prime (9888765444461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4944382722180 + 4944382722181.

It is an arithmetic number, because the mean of its divisors is an integer number (4944382722181).

Almost surely, 2^{9888765444361} is an apocalyptic number.

It is an amenable number.

9888765444361 is a deficient number, since it is larger than the sum of its proper divisors (1).

9888765444361 is an equidigital number, since it uses as much as digits as its factorization.

9888765444361 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1114767360, while the sum is 73.

The spelling of 9888765444361 in words is "nine trillion, eight hundred eighty-eight billion, seven hundred sixty-five million, four hundred forty-four thousand, three hundred sixty-one".