198992604630401 has 4 divisors (see below), whose sum is σ = 199170753785172. Its totient is φ = 198814455475632.

The previous prime is 198992604630389. The next prime is 198992604630419. The reversal of 198992604630401 is 104036406299891.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7662183844225 + 191330420786176 = 2768065^2 + 13832224^2 .

It is a cyclic number.

It is not a de Polignac number, because 198992604630401 - 2²⁶ = 198992537521537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (198992604630481) 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 3 ways as a sum of consecutive naturals, for example, 89074575710 + ... + 89074577943.

It is an arithmetic number, because the mean of its divisors is an integer number (49792688446293).

Almost surely, 2^{198992604630401} is an apocalyptic number.

It is an amenable number.

198992604630401 is a deficient number, since it is larger than the sum of its proper divisors (178149154771).

198992604630401 is a wasteful number, since it uses less digits than its factorization.

198992604630401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178149154770.

The product of its (nonzero) digits is 20155392, while the sum is 62.

The spelling of 198992604630401 in words is "one hundred ninety-eight trillion, nine hundred ninety-two billion, six hundred four million, six hundred thirty thousand, four hundred one".