198527215488 has 128 divisors (see below), whose sum is σ = 605305536000. Its totient is φ = 56474191872.

The previous prime is 198527215387. The next prime is 198527215499. The reversal of 198527215488 is 884512725891.

It is a tau number, because it is divible by the number of its divisors (128).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 454293 + ... + 776811.

It is an arithmetic number, because the mean of its divisors is an integer number (4728949500).

Almost surely, 2^198527215488 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 198527215488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (302652768000).

198527215488 is an abundant number, since it is smaller than the sum of its proper divisors (406778320512).

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

198527215488 is a wasteful number, since it uses less digits than its factorization.

198527215488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 322772 (or 322760 counting only the distinct ones).

The product of its digits is 12902400, while the sum is 60.

The spelling of 198527215488 in words is "one hundred ninety-eight billion, five hundred twenty-seven million, two hundred fifteen thousand, four hundred eighty-eight".