198045438911 has 8 divisors (see below), whose sum is σ = 206863412064. Its totient is φ = 189244740960.

The previous prime is 198045438859. The next prime is 198045438931. The reversal of 198045438911 is 119834540891.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 198045438911 - 2⁶ = 198045438847 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198045438931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4295360 + ... + 4341221.

It is an arithmetic number, because the mean of its divisors is an integer number (25857926508).

Almost surely, 2^198045438911 is an apocalyptic number.

198045438911 is a deficient number, since it is larger than the sum of its proper divisors (8817973153).

198045438911 is an equidigital number, since it uses as much as digits as its factorization.

198045438911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8637601.

The product of its (nonzero) digits is 1244160, while the sum is 53.

The spelling of 198045438911 in words is "one hundred ninety-eight billion, forty-five million, four hundred thirty-eight thousand, nine hundred eleven".