198443143425 has 24 divisors (see below), whose sum is σ = 332587093024. Its totient is φ = 104386527360.

The previous prime is 198443143399. The next prime is 198443143433. The reversal of 198443143425 is 524341344891.

It is not a de Polignac number, because 198443143425 - 2¹⁸ = 198442881281 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18117187 + ... + 18128136.

Almost surely, 2^198443143425 is an apocalyptic number.

198443143425 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

198443143425 is a deficient number, since it is larger than the sum of its proper divisors (134143949599).

198443143425 is a wasteful number, since it uses less digits than its factorization.

198443143425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36245409 (or 36245404 counting only the distinct ones).

The product of its digits is 1658880, while the sum is 48.

The spelling of 198443143425 in words is "one hundred ninety-eight billion, four hundred forty-three million, one hundred forty-three thousand, four hundred twenty-five".