9915668596489 has 2 divisors, whose sum is σ = 9915668596490. Its totient is φ = 9915668596488.

The previous prime is 9915668596481. The next prime is 9915668596511. The reversal of 9915668596489 is 9846958665199.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6296987984400 + 3618680612089 = 2509380^2 + 1902283^2 .

It is a cyclic number.

It is not a de Polignac number, because 9915668596489 - 2³ = 9915668596481 is a prime.

It is not a weakly prime, because it can be changed into another prime (9915668596481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4957834298244 + 4957834298245.

It is an arithmetic number, because the mean of its divisors is an integer number (4957834298245).

Almost surely, 2^{9915668596489} is an apocalyptic number.

It is an amenable number.

9915668596489 is a deficient number, since it is larger than the sum of its proper divisors (1).

9915668596489 is an equidigital number, since it uses as much as digits as its factorization.

9915668596489 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9069926400, while the sum is 85.

The spelling of 9915668596489 in words is "nine trillion, nine hundred fifteen billion, six hundred sixty-eight million, five hundred ninety-six thousand, four hundred eighty-nine".