198791775493 has 8 divisors (see below), whose sum is σ = 207624944160. Its totient is φ = 190140734160.

The previous prime is 198791775443. The next prime is 198791775503. The reversal of 198791775493 is 394577197891.

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 198791775493 - 2²¹ = 198789678341 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 (198791775443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45529603 + ... + 45533968.

It is an arithmetic number, because the mean of its divisors is an integer number (25953118020).

Almost surely, 2^198791775493 is an apocalyptic number.

It is an amenable number.

198791775493 is a deficient number, since it is larger than the sum of its proper divisors (8833168667).

198791775493 is an equidigital number, since it uses as much as digits as its factorization.

198791775493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91063667.

The product of its digits is 120022560, while the sum is 70.

The spelling of 198791775493 in words is "one hundred ninety-eight billion, seven hundred ninety-one million, seven hundred seventy-five thousand, four hundred ninety-three".