9286778644789 has 2 divisors, whose sum is σ = 9286778644790. Its totient is φ = 9286778644788.

The previous prime is 9286778644783. The next prime is 9286778644907. The reversal of 9286778644789 is 9874468776829.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4833973876900 + 4452804767889 = 2198630^2 + 2110167^2 .

It is a cyclic number.

It is not a de Polignac number, because 9286778644789 - 2⁴¹ = 7087755389237 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9286778644783) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4643389322394 + 4643389322395.

It is an arithmetic number, because the mean of its divisors is an integer number (4643389322395).

Almost surely, 2^{9286778644789} is an apocalyptic number.

It is an amenable number.

9286778644789 is a deficient number, since it is larger than the sum of its proper divisors (1).

9286778644789 is an equidigital number, since it uses as much as digits as its factorization.

9286778644789 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16387080192, while the sum is 85.

The spelling of 9286778644789 in words is "nine trillion, two hundred eighty-six billion, seven hundred seventy-eight million, six hundred forty-four thousand, seven hundred eighty-nine".