198475386849 has 12 divisors (see below), whose sum is σ = 286697863296. Its totient is φ = 132311758392.

The previous prime is 198475386827. The next prime is 198475386871. The reversal of 198475386849 is 948683574891.

198475386849 is a `hidden beast` number, since 1 + 9 + 8 + 4 + 7 + 538 + 6 + 84 + 9 = 666.

198475386849 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (198475386827) and next prime (198475386871).

It is not a de Polignac number, because 198475386849 - 2⁵ = 198475386817 is a prime.

It is not an unprimeable number, because it can be changed into a prime (198475386899) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 179497 + ... + 655110.

It is an arithmetic number, because the mean of its divisors is an integer number (23891488608).

Almost surely, 2^198475386849 is an apocalyptic number.

It is an amenable number.

198475386849 is a deficient number, since it is larger than the sum of its proper divisors (88222476447).

198475386849 is a wasteful number, since it uses less digits than its factorization.

198475386849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 861036 (or 861033 counting only the distinct ones).

The product of its digits is 418037760, while the sum is 72.

The spelling of 198475386849 in words is "one hundred ninety-eight billion, four hundred seventy-five million, three hundred eighty-six thousand, eight hundred forty-nine".