198053661771 has 12 divisors (see below), whose sum is σ = 326945727472. Its totient is φ = 113173520976.

The previous prime is 198053661737. The next prime is 198053661787. The reversal of 198053661771 is 177166350891.

198053661771 is a `hidden beast` number, since 1 + 98 + 0 + 536 + 6 + 17 + 7 + 1 = 666.

198053661771 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 198053661771 - 2¹⁸ = 198053399627 is a prime.

It is not an unprimeable number, because it can be changed into a prime (198053661721) 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, 1571854396 + ... + 1571854521.

Almost surely, 2^198053661771 is an apocalyptic number.

198053661771 is a deficient number, since it is larger than the sum of its proper divisors (128892065701).

198053661771 is a wasteful number, since it uses less digits than its factorization.

198053661771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3143708930 (or 3143708927 counting only the distinct ones).

The product of its (nonzero) digits is 1905120, while the sum is 54.

The spelling of 198053661771 in words is "one hundred ninety-eight billion, fifty-three million, six hundred sixty-one thousand, seven hundred seventy-one".