198961136331 has 8 divisors (see below), whose sum is σ = 274429153680. Its totient is φ = 128066938272.

The previous prime is 198961136329. The next prime is 198961136351. The reversal of 198961136331 is 133631169891.

It is a happy number.

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

It is not a de Polignac number, because 198961136331 - 2¹ = 198961136329 is a prime.

It is a super-2 number, since 2×198961136331² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (198961136351) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1143454720 + ... + 1143454893.

It is an arithmetic number, because the mean of its divisors is an integer number (34303644210).

Almost surely, 2^198961136331 is an apocalyptic number.

198961136331 is a deficient number, since it is larger than the sum of its proper divisors (75468017349).

198961136331 is a wasteful number, since it uses less digits than its factorization.

198961136331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2286909645.

The product of its digits is 629856, while the sum is 51.

The spelling of 198961136331 in words is "one hundred ninety-eight billion, nine hundred sixty-one million, one hundred thirty-six thousand, three hundred thirty-one".