198679895508 has 12 divisors (see below), whose sum is σ = 463586422880. Its totient is φ = 66226631832.

The previous prime is 198679895501. The next prime is 198679895527. The reversal of 198679895508 is 805598976891.

198679895508 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 198679895508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198679895501) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8278328968 + ... + 8278328991.

Almost surely, 2^198679895508 is an apocalyptic number.

It is an amenable number.

198679895508 is an abundant number, since it is smaller than the sum of its proper divisors (264906527372).

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

198679895508 is a wasteful number, since it uses less digits than its factorization.

198679895508 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16556657966 (or 16556657964 counting only the distinct ones).

The product of its (nonzero) digits is 391910400, while the sum is 75.

The spelling of 198679895508 in words is "one hundred ninety-eight billion, six hundred seventy-nine million, eight hundred ninety-five thousand, five hundred eight".