198091081982436 has 48 divisors (see below), whose sum is σ = 470049615974400. Its totient is φ = 64910790376992.

The previous prime is 198091081982407. The next prime is 198091081982653. The reversal of 198091081982436 is 634289180190891.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 123059985 + ... + 124659303.

It is an arithmetic number, because the mean of its divisors is an integer number (9792700332800).

Almost surely, 2^{198091081982436} is an apocalyptic number.

It is an amenable number.

198091081982436 is an abundant number, since it is smaller than the sum of its proper divisors (271958533991964).

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

198091081982436 is a wasteful number, since it uses less digits than its factorization.

198091081982436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1774328 (or 1774326 counting only the distinct ones).

The product of its (nonzero) digits is 53747712, while the sum is 69.

The spelling of 198091081982436 in words is "one hundred ninety-eight trillion, ninety-one billion, eighty-one million, nine hundred eighty-two thousand, four hundred thirty-six".