198457143171839 has 8 divisors (see below), whose sum is σ = 201160554252672. Its totient is φ = 195761169261720.

The previous prime is 198457143171829. The next prime is 198457143171841. The reversal of 198457143171839 is 938171341754891.

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 198457143171839 - 2¹² = 198457143167743 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 (198457143171829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1859238947 + ... + 1859345684.

It is an arithmetic number, because the mean of its divisors is an integer number (25145069281584).

Almost surely, 2^{198457143171839} is an apocalyptic number.

198457143171839 is a deficient number, since it is larger than the sum of its proper divisors (2703411080833).

198457143171839 is an equidigital number, since it uses as much as digits as its factorization.

198457143171839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3718585357.

The product of its digits is 182891520, while the sum is 71.

The spelling of 198457143171839 in words is "one hundred ninety-eight trillion, four hundred fifty-seven billion, one hundred forty-three million, one hundred seventy-one thousand, eight hundred thirty-nine".