2018559553909 has 2 divisors, whose sum is σ = 2018559553910. Its totient is φ = 2018559553908.

The previous prime is 2018559553867. The next prime is 2018559554017. The reversal of 2018559553909 is 9093559558102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1141311895684 + 877247658225 = 1068322^2 + 936615^2 .

It is a cyclic number.

It is not a de Polignac number, because 2018559553909 - 2⁷ = 2018559553781 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2018559551909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1009279776954 + 1009279776955.

It is an arithmetic number, because the mean of its divisors is an integer number (1009279776955).

Almost surely, 2^{2018559553909} is an apocalyptic number.

It is an amenable number.

2018559553909 is a deficient number, since it is larger than the sum of its proper divisors (1).

2018559553909 is an equidigital number, since it uses as much as digits as its factorization.

2018559553909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21870000, while the sum is 61.

The spelling of 2018559553909 in words is "two trillion, eighteen billion, five hundred fifty-nine million, five hundred fifty-three thousand, nine hundred nine".