198165663649593 has 16 divisors (see below), whose sum is σ = 293580658676800. Its totient is φ = 132109588461600.

The previous prime is 198165663649567. The next prime is 198165663649633. The reversal of 198165663649593 is 395946366561891.

198165663649593 is a `hidden beast` number, since 1 + 9 + 8 + 1 + 6 + 5 + 6 + 6 + 36 + 495 + 93 = 666.

It is not a de Polignac number, because 198165663649593 - 2²² = 198165659455289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (198165663649523) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19453183 + ... + 27834468.

It is an arithmetic number, because the mean of its divisors is an integer number (18348791167300).

Almost surely, 2^{198165663649593} is an apocalyptic number.

It is an amenable number.

198165663649593 is a deficient number, since it is larger than the sum of its proper divisors (95414995027207).

198165663649593 is a wasteful number, since it uses less digits than its factorization.

198165663649593 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47442869 (or 47442863 counting only the distinct ones).

The product of its digits is 6802444800, while the sum is 81.

The spelling of 198165663649593 in words is "one hundred ninety-eight trillion, one hundred sixty-five billion, six hundred sixty-three million, six hundred forty-nine thousand, five hundred ninety-three".