198698663591504 has 20 divisors (see below), whose sum is σ = 385782374002560. Its totient is φ = 99141921913440.

The previous prime is 198698663591497. The next prime is 198698663591557. The reversal of 198698663591504 is 405195366896891.

It is a happy number.

It is a super-3 number, since 3×198698663591504³ (a number of 44 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

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, 12963109742 + ... + 12963125069.

It is an arithmetic number, because the mean of its divisors is an integer number (19289118700128).

Almost surely, 2^{198698663591504} is an apocalyptic number.

It is an amenable number.

198698663591504 is a deficient number, since it is larger than the sum of its proper divisors (187083710411056).

198698663591504 is a wasteful number, since it uses less digits than its factorization.

198698663591504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25926235298 (or 25926235292 counting only the distinct ones).

The product of its (nonzero) digits is 3023308800, while the sum is 80.

The spelling of 198698663591504 in words is "one hundred ninety-eight trillion, six hundred ninety-eight billion, six hundred sixty-three million, five hundred ninety-one thousand, five hundred four".