198560381652 has 36 divisors (see below), whose sum is σ = 502021155636. Its totient is φ = 66172995840.

The previous prime is 198560381651. The next prime is 198560381707. The reversal of 198560381652 is 256183065891.

198560381652 is a `hidden beast` number, since 19 + 8 + 5 + 603 + 8 + 16 + 5 + 2 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 127316230596 + 71244151056 = 356814^2 + 266916^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198560381651) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 399099 + ... + 745922.

It is an arithmetic number, because the mean of its divisors is an integer number (13945032101).

Almost surely, 2^198560381652 is an apocalyptic number.

198560381652 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

198560381652 is an abundant number, since it is smaller than the sum of its proper divisors (303460773984).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

198560381652 is a wasteful number, since it uses less digits than its factorization.

198560381652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1149848 (or 1149843 counting only the distinct ones).

The product of its (nonzero) digits is 3110400, while the sum is 54.

The spelling of 198560381652 in words is "one hundred ninety-eight billion, five hundred sixty million, three hundred eighty-one thousand, six hundred fifty-two".