198378888692 has 24 divisors (see below), whose sum is σ = 349519665600. Its totient is φ = 98517452096.

The previous prime is 198378888691. The next prime is 198378888707. The reversal of 198378888692 is 296888873891.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198378888691) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 435608 + ... + 765840.

It is an arithmetic number, because the mean of its divisors is an integer number (14563319400).

Almost surely, 2^198378888692 is an apocalyptic number.

It is an amenable number.

198378888692 is a deficient number, since it is larger than the sum of its proper divisors (151140776908).

198378888692 is a wasteful number, since it uses less digits than its factorization.

198378888692 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 331255 (or 331253 counting only the distinct ones).

The product of its digits is 668860416, while the sum is 77.

The spelling of 198378888692 in words is "one hundred ninety-eight billion, three hundred seventy-eight million, eight hundred eighty-eight thousand, six hundred ninety-two".