198331402732988 has 18 divisors (see below), whose sum is σ = 403746069849696. Its totient is φ = 84999172599768.

The previous prime is 198331402732937. The next prime is 198331402733017. The reversal of 198331402732988 is 889237204133891.

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 5 ways as a sum of consecutive naturals, for example, 505947455756 + ... + 505947456147.

It is an arithmetic number, because the mean of its divisors is an integer number (22430337213872).

Almost surely, 2^{198331402732988} is an apocalyptic number.

It is an amenable number.

198331402732988 is an abundant number, since it is smaller than the sum of its proper divisors (205414667116708).

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

198331402732988 is a wasteful number, since it uses less digits than its factorization.

198331402732988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1011894911921 (or 1011894911912 counting only the distinct ones).

The product of its (nonzero) digits is 125411328, while the sum is 68.

The spelling of 198331402732988 in words is "one hundred ninety-eight trillion, three hundred thirty-one billion, four hundred two million, seven hundred thirty-two thousand, nine hundred eighty-eight".