198513566747 has 4 divisors (see below), whose sum is σ = 200334792240. Its totient is φ = 196692341256.

The previous prime is 198513566737. The next prime is 198513566767. The reversal of 198513566747 is 747665315891.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 198513566747 - 2⁸ = 198513566491 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 198513566747.

It is not an unprimeable number, because it can be changed into a prime (198513566737) 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 3 ways as a sum of consecutive naturals, for example, 910612583 + ... + 910612800.

It is an arithmetic number, because the mean of its divisors is an integer number (50083698060).

Almost surely, 2^198513566747 is an apocalyptic number.

198513566747 is a deficient number, since it is larger than the sum of its proper divisors (1821225493).

198513566747 is a wasteful number, since it uses less digits than its factorization.

198513566747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1821225492.

The product of its digits is 38102400, while the sum is 62.

The spelling of 198513566747 in words is "one hundred ninety-eight billion, five hundred thirteen million, five hundred sixty-six thousand, seven hundred forty-seven".