198379985376049 has 3 divisors (see below), whose sum is σ = 198379999460793. Its totient is φ = 198379971291306.

The previous prime is 198379985376029. The next prime is 198379985376091. The reversal of 198379985376049 is 940673589973891.

The square root of 198379985376049 is 14084743.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 198379985376049 - 2¹⁷ = 198379985244977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (198379985376029) 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 2 ways as a sum of consecutive naturals, for example, 7042372 + ... + 21127114.

It is an arithmetic number, because the mean of its divisors is an integer number (66126666486931).

Almost surely, 2^{198379985376049} is an apocalyptic number.

198379985376049 is the 14084743-rd square number.

198379985376049 is the 7042372-nd centered octagonal number.

It is an amenable number.

198379985376049 is a deficient number, since it is larger than the sum of its proper divisors (14084744).

198379985376049 is an frugal number, since it uses more digits than its factorization.

198379985376049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28169486 (or 14084743 counting only the distinct ones).

The product of its (nonzero) digits is 22221319680, while the sum is 88.

The spelling of 198379985376049 in words is "one hundred ninety-eight trillion, three hundred seventy-nine billion, nine hundred eighty-five million, three hundred seventy-six thousand, forty-nine".