198253143791 has 8 divisors (see below), whose sum is σ = 208751658480. Its totient is φ = 187761043008.

The previous prime is 198253143703. The next prime is 198253143841. The reversal of 198253143791 is 197341352891.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-198253143791 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 (198253143191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1539956 + ... + 1663721.

It is an arithmetic number, because the mean of its divisors is an integer number (26093957310).

Almost surely, 2^198253143791 is an apocalyptic number.

198253143791 is a deficient number, since it is larger than the sum of its proper divisors (10498514689).

198253143791 is a wasteful number, since it uses less digits than its factorization.

198253143791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3206953.

The product of its digits is 1632960, while the sum is 53.

The spelling of 198253143791 in words is "one hundred ninety-eight billion, two hundred fifty-three million, one hundred forty-three thousand, seven hundred ninety-one".