198321646416 has 80 divisors (see below), whose sum is σ = 524459069376. Its totient is φ = 64543546368.

The previous prime is 198321646403. The next prime is 198321646511. The reversal of 198321646416 is 614646123891.

It is a happy number.

It is a hoax number, since the sum of its digits (51) coincides with the sum of the digits of its distinct prime factors.

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, 5416266 + ... + 5452758.

Almost surely, 2^198321646416 is an apocalyptic number.

198321646416 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 198321646416, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (262229534688).

198321646416 is an abundant number, since it is smaller than the sum of its proper divisors (326137422960).

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

198321646416 is a wasteful number, since it uses less digits than its factorization.

198321646416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39180 (or 39174 counting only the distinct ones).

The product of its digits is 1492992, while the sum is 51.

The spelling of 198321646416 in words is "one hundred ninety-eight billion, three hundred twenty-one million, six hundred forty-six thousand, four hundred sixteen".