9845357890897 has 2 divisors, whose sum is σ = 9845357890898. Its totient is φ = 9845357890896.

The previous prime is 9845357890877. The next prime is 9845357890903. The reversal of 9845357890897 is 7980987535489.

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., 9375133629456 + 470224261441 = 3061884^2 + 685729^2 .

It is a cyclic number.

It is not a de Polignac number, because 9845357890897 - 2¹⁹ = 9845357366609 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 9845357890897.

It is not a weakly prime, because it can be changed into another prime (9845357890817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4922678945448 + 4922678945449.

It is an arithmetic number, because the mean of its divisors is an integer number (4922678945449).

Almost surely, 2^{9845357890897} is an apocalyptic number.

It is an amenable number.

9845357890897 is a deficient number, since it is larger than the sum of its proper divisors (1).

9845357890897 is an equidigital number, since it uses as much as digits as its factorization.

9845357890897 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5486745600, while the sum is 82.

The spelling of 9845357890897 in words is "nine trillion, eight hundred forty-five billion, three hundred fifty-seven million, eight hundred ninety thousand, eight hundred ninety-seven".