198078268308 has 96 divisors (see below), whose sum is σ = 482701148160. Its totient is φ = 63171239040.

The previous prime is 198078268253. The next prime is 198078268313. The reversal of 198078268308 is 803862870891.

It is a Smith number, since the sum of its digits (60) coincides with the sum of the digits of its 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 31 ways as a sum of consecutive naturals, for example, 5157898 + ... + 5196158.

It is an arithmetic number, because the mean of its divisors is an integer number (5028136960).

Almost surely, 2^198078268308 is an apocalyptic number.

It is an amenable number.

198078268308 is an abundant number, since it is smaller than the sum of its proper divisors (284622879852).

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

198078268308 is a wasteful number, since it uses less digits than its factorization.

198078268308 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38517 (or 38515 counting only the distinct ones).

The product of its (nonzero) digits is 9289728, while the sum is 60.

The spelling of 198078268308 in words is "one hundred ninety-eight billion, seventy-eight million, two hundred sixty-eight thousand, three hundred eight".