198443143424 has 18 divisors (see below), whose sum is σ = 396111118830. Its totient is φ = 99221571584.

The previous prime is 198443143399. The next prime is 198443143433. The reversal of 198443143424 is 424341344891.

It can be written as a sum of positive squares in only one way, i.e., 185726521600 + 12716621824 = 430960^2 + 112768^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 387584009 + ... + 387584520.

Almost surely, 2^198443143424 is an apocalyptic number.

It is an amenable number.

198443143424 is a deficient number, since it is larger than the sum of its proper divisors (197667975406).

198443143424 is an frugal number, since it uses more digits than its factorization.

198443143424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 775168545 (or 775168531 counting only the distinct ones).

The product of its digits is 1327104, while the sum is 47.

The spelling of 198443143424 in words is "one hundred ninety-eight billion, four hundred forty-three million, one hundred forty-three thousand, four hundred twenty-four".