198649728816 has 120 divisors (see below), whose sum is σ = 644654072832. Its totient is φ = 51597321600.

The previous prime is 198649728773. The next prime is 198649728847. The reversal of 198649728816 is 618827946891.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2402400 + ... + 2483711.

Almost surely, 2^198649728816 is an apocalyptic number.

198649728816 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

198649728816 is an abundant number, since it is smaller than the sum of its proper divisors (446004344016).

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

198649728816 is a wasteful number, since it uses less digits than its factorization.

198649728816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4886151 (or 4886134 counting only the distinct ones).

The product of its digits is 83607552, while the sum is 69.

The spelling of 198649728816 in words is "one hundred ninety-eight billion, six hundred forty-nine million, seven hundred twenty-eight thousand, eight hundred sixteen".