198352063881 has 18 divisors (see below), whose sum is σ = 286764085790. Its totient is φ = 132116817600.

The previous prime is 198352063873. The next prime is 198352063883. The reversal of 198352063881 is 188360253891.

198352063881 is a `hidden beast` number, since 1 + 9 + 8 + 3 + 520 + 6 + 38 + 81 = 666.

198352063881 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 65607699600 + 132744364281 = 256140^2 + 364341^2 .

It is not a de Polignac number, because 198352063881 - 2³ = 198352063873 is a prime.

It is a super-2 number, since 2×198352063881² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (198352063883) 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 17 ways as a sum of consecutive naturals, for example, 53592331 + ... + 53596031.

Almost surely, 2^198352063881 is an apocalyptic number.

It is an amenable number.

198352063881 is a deficient number, since it is larger than the sum of its proper divisors (88412021909).

198352063881 is an frugal number, since it uses more digits than its factorization.

198352063881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9017 (or 5313 counting only the distinct ones).

The product of its (nonzero) digits is 2488320, while the sum is 54.

The spelling of 198352063881 in words is "one hundred ninety-eight billion, three hundred fifty-two million, sixty-three thousand, eight hundred eighty-one".