9559621209601 has 2 divisors, whose sum is σ = 9559621209602. Its totient is φ = 9559621209600.

The previous prime is 9559621209583. The next prime is 9559621209623. The reversal of 9559621209601 is 1069021269559.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8419746822400 + 1139874387201 = 2901680^2 + 1067649^2 .

It is a cyclic number.

It is not a de Polignac number, because 9559621209601 - 2⁵ = 9559621209569 is a prime.

It is not a weakly prime, because it can be changed into another prime (9559621209101) 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, 4779810604800 + 4779810604801.

It is an arithmetic number, because the mean of its divisors is an integer number (4779810604801).

Almost surely, 2^{9559621209601} is an apocalyptic number.

It is an amenable number.

9559621209601 is a deficient number, since it is larger than the sum of its proper divisors (1).

9559621209601 is an equidigital number, since it uses as much as digits as its factorization.

9559621209601 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2624400, while the sum is 55.

The spelling of 9559621209601 in words is "nine trillion, five hundred fifty-nine billion, six hundred twenty-one million, two hundred nine thousand, six hundred one".