198013562409589 has 2 divisors, whose sum is σ = 198013562409590. Its totient is φ = 198013562409588.

The previous prime is 198013562409583. The next prime is 198013562409613. The reversal of 198013562409589 is 985904265310891.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 131398305668100 + 66615256741489 = 11462910^2 + 8161817^2 .

It is an emirp because it is prime and its reverse (985904265310891) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 198013562409589 - 2²⁵ = 198013528855157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (198013562409583) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99006781204794 + 99006781204795.

It is an arithmetic number, because the mean of its divisors is an integer number (99006781204795).

Almost surely, 2^{198013562409589} is an apocalyptic number.

It is an amenable number.

198013562409589 is a deficient number, since it is larger than the sum of its proper divisors (1).

198013562409589 is an equidigital number, since it uses as much as digits as its factorization.

198013562409589 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 167961600, while the sum is 70.

The spelling of 198013562409589 in words is "one hundred ninety-eight trillion, thirteen billion, five hundred sixty-two million, four hundred nine thousand, five hundred eighty-nine".