198279438974 has 8 divisors (see below), whose sum is σ = 313072798440. Its totient is φ = 93921839496.

The previous prime is 198279438961. The next prime is 198279438997. The reversal of 198279438974 is 479834972891.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 198279438898 and 198279438907.

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 3 ways as a sum of consecutive naturals, for example, 2608939949 + ... + 2608940024.

It is an arithmetic number, because the mean of its divisors is an integer number (39134099805).

Almost surely, 2^198279438974 is an apocalyptic number.

198279438974 is a deficient number, since it is larger than the sum of its proper divisors (114793359466).

198279438974 is a wasteful number, since it uses less digits than its factorization.

198279438974 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5217879994.

The product of its digits is 219469824, while the sum is 71.

The spelling of 198279438974 in words is "one hundred ninety-eight billion, two hundred seventy-nine million, four hundred thirty-eight thousand, nine hundred seventy-four".