9878560658789 has 2 divisors, whose sum is σ = 9878560658790. Its totient is φ = 9878560658788.

The previous prime is 9878560658783. The next prime is 9878560658831.

It is a happy number.

9878560658789 is nontrivially palindromic in base 10.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7784630109025 + 2093930549764 = 2790095^2 + 1447042^2 .

It is a palprime.

It is a cyclic number.

It is not a de Polignac number, because 9878560658789 - 2⁴ = 9878560658773 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 9878560658789.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9878560658783) 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, 4939280329394 + 4939280329395.

It is an arithmetic number, because the mean of its divisors is an integer number (4939280329395).

Almost surely, 2^{9878560658789} is an apocalyptic number.

It is an amenable number.

9878560658789 is a deficient number, since it is larger than the sum of its proper divisors (1).

9878560658789 is an equidigital number, since it uses as much as digits as its factorization.

9878560658789 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14631321600, while the sum is 86.

The spelling of 9878560658789 in words is "nine trillion, eight hundred seventy-eight billion, five hundred sixty million, six hundred fifty-eight thousand, seven hundred eighty-nine".