198532878336 has 416 divisors, whose sum is σ = 670760334720. Its totient is φ = 57486606336.

The previous prime is 198532878331. The next prime is 198532878361. The reversal of 198532878336 is 633878235891.

198532878336 is a `hidden beast` number, since 1 + 98 + 532 + 8 + 7 + 8 + 3 + 3 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (416).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198532878331) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 24436771 + ... + 24444893.

Almost surely, 2^198532878336 is an apocalyptic number.

198532878336 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 198532878336, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (335380167360).

198532878336 is an abundant number, since it is smaller than the sum of its proper divisors (472227456384).

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

198532878336 is a wasteful number, since it uses less digits than its factorization.

198532878336 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8186 (or 8158 counting only the distinct ones).

The product of its digits is 52254720, while the sum is 63.

The spelling of 198532878336 in words is "one hundred ninety-eight billion, five hundred thirty-two million, eight hundred seventy-eight thousand, three hundred thirty-six".