198586206340 has 12 divisors (see below), whose sum is σ = 417031033356. Its totient is φ = 79434482528.

The previous prime is 198586206311. The next prime is 198586206383. The reversal of 198586206340 is 43602685891.

It can be written as a sum of positive squares in 2 ways, for example, as 75716327556 + 122869878784 = 275166^2 + 350528^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4964655139 + ... + 4964655178.

It is an arithmetic number, because the mean of its divisors is an integer number (34752586113).

Almost surely, 2^198586206340 is an apocalyptic number.

198586206340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

198586206340 is an abundant number, since it is smaller than the sum of its proper divisors (218444827016).

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

198586206340 is a wasteful number, since it uses less digits than its factorization.

198586206340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9929310326 (or 9929310324 counting only the distinct ones).

The product of its (nonzero) digits is 2488320, while the sum is 52.

The spelling of 198586206340 in words is "one hundred ninety-eight billion, five hundred eighty-six million, two hundred six thousand, three hundred forty".