198940508061 has 8 divisors (see below), whose sum is σ = 276786793920. Its totient is φ = 126860613792.

The previous prime is 198940508027. The next prime is 198940508071. The reversal of 198940508061 is 160805049891.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 198940508061 - 2¹⁰ = 198940507037 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 198940507995 and 198940508013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198940508071) 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 7 ways as a sum of consecutive naturals, for example, 1441597816 + ... + 1441597953.

It is an arithmetic number, because the mean of its divisors is an integer number (34598349240).

Almost surely, 2^198940508061 is an apocalyptic number.

It is an amenable number.

198940508061 is a deficient number, since it is larger than the sum of its proper divisors (77846285859).

198940508061 is a wasteful number, since it uses less digits than its factorization.

198940508061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2883195795.

The product of its (nonzero) digits is 622080, while the sum is 51.

The spelling of 198940508061 in words is "one hundred ninety-eight billion, nine hundred forty million, five hundred eight thousand, sixty-one".