198098655981 has 8 divisors (see below), whose sum is σ = 264148599264. Its totient is φ = 132057241680.

The previous prime is 198098655977. The next prime is 198098656013. The reversal of 198098655981 is 189556890891.

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

It is not a de Polignac number, because 198098655981 - 2² = 198098655977 is a prime.

It is a super-2 number, since 2×198098655981² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198098655971) 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, 2077851 + ... + 2171096.

It is an arithmetic number, because the mean of its divisors is an integer number (33018574908).

Almost surely, 2^198098655981 is an apocalyptic number.

It is an amenable number.

198098655981 is a deficient number, since it is larger than the sum of its proper divisors (66049943283).

198098655981 is a wasteful number, since it uses less digits than its factorization.

198098655981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4264491.

The product of its (nonzero) digits is 55987200, while the sum is 69.

The spelling of 198098655981 in words is "one hundred ninety-eight billion, ninety-eight million, six hundred fifty-five thousand, nine hundred eighty-one".