198233945868 has 144 divisors (see below), whose sum is σ = 570710448000. Its totient is φ = 53247317760.

The previous prime is 198233945867. The next prime is 198233945869. The reversal of 198233945868 is 868549332891.

It is an interprime number because it is at equal distance from previous prime (198233945867) and next prime (198233945869).

It is a junction number, because it is equal to n+sod(n) for n = 198233945799 and 198233945808.

It is not an unprimeable number, because it can be changed into a prime (198233945867) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1395808 + ... + 1531256.

It is an arithmetic number, because the mean of its divisors is an integer number (3963267000).

Almost surely, 2^198233945868 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 198233945868, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (285355224000).

198233945868 is an abundant number, since it is smaller than the sum of its proper divisors (372476502132).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

198233945868 is a wasteful number, since it uses less digits than its factorization.

198233945868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135620 (or 135611 counting only the distinct ones).

The product of its digits is 89579520, while the sum is 66.

The spelling of 198233945868 in words is "one hundred ninety-eight billion, two hundred thirty-three million, nine hundred forty-five thousand, eight hundred sixty-eight".