198138502143 has 12 divisors (see below), whose sum is σ = 288289111968. Its totient is φ = 131128156320.

The previous prime is 198138502141. The next prime is 198138502171. The reversal of 198138502143 is 341205831891.

198138502143 is a `hidden beast` number, since 1 + 9 + 8 + 138 + 502 + 1 + 4 + 3 = 666.

It is not a de Polignac number, because 198138502143 - 2¹ = 198138502141 is a prime.

It is a super-3 number, since 3×198138502143³ (a number of 35 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198138502141) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 80346903 + ... + 80349368.

It is an arithmetic number, because the mean of its divisors is an integer number (24024092664).

Almost surely, 2^198138502143 is an apocalyptic number.

198138502143 is a deficient number, since it is larger than the sum of its proper divisors (90150609825).

198138502143 is a wasteful number, since it uses less digits than its factorization.

198138502143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160696414 (or 160696411 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 45.

The spelling of 198138502143 in words is "one hundred ninety-eight billion, one hundred thirty-eight million, five hundred two thousand, one hundred forty-three".