198851612255 has 8 divisors (see below), whose sum is σ = 238672507824. Its totient is φ = 159047574400.

The previous prime is 198851612221. The next prime is 198851612261. The reversal of 198851612255 is 552216158891.

It is a happy number.

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

It is not a de Polignac number, because 198851612255 - 2¹⁴ = 198851595871 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 198851612197 and 198851612206.

It is a congruent number.

It is an unprimeable number.

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, 4188461 + ... + 4235670.

It is an arithmetic number, because the mean of its divisors is an integer number (29834063478).

Almost surely, 2^198851612255 is an apocalyptic number.

198851612255 is a deficient number, since it is larger than the sum of its proper divisors (39820895569).

198851612255 is an equidigital number, since it uses as much as digits as its factorization.

198851612255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8428857.

The product of its digits is 1728000, while the sum is 53.

The spelling of 198851612255 in words is "one hundred ninety-eight billion, eight hundred fifty-one million, six hundred twelve thousand, two hundred fifty-five".