198547178816 has 112 divisors (see below), whose sum is σ = 463831570176. Its totient is φ = 82543878144.

The previous prime is 198547178813. The next prime is 198547178827. The reversal of 198547178816 is 618871745891.

It is a tau number, because it is divible by the number of its divisors (112).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198547178813) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5568341 + ... + 5603883.

Almost surely, 2^198547178816 is an apocalyptic number.

198547178816 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 198547178816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (231915785088).

198547178816 is an abundant number, since it is smaller than the sum of its proper divisors (265284391360).

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

198547178816 is a wasteful number, since it uses less digits than its factorization.

198547178816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35936 (or 35926 counting only the distinct ones).

The product of its digits is 27095040, while the sum is 65.

The spelling of 198547178816 in words is "one hundred ninety-eight billion, five hundred forty-seven million, one hundred seventy-eight thousand, eight hundred sixteen".