198475993718 has 32 divisors (see below), whose sum is σ = 315966057120. Its totient is φ = 93181593600.

The previous prime is 198475993711. The next prime is 198475993721. The reversal of 198475993718 is 817399574891.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198475993711) 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, 45013898 + ... + 45018306.

It is an arithmetic number, because the mean of its divisors is an integer number (9873939285).

Almost surely, 2^198475993718 is an apocalyptic number.

198475993718 is a deficient number, since it is larger than the sum of its proper divisors (117490063402).

198475993718 is a wasteful number, since it uses less digits than its factorization.

198475993718 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7232.

The product of its digits is 137168640, while the sum is 71.

The spelling of 198475993718 in words is "one hundred ninety-eight billion, four hundred seventy-five million, nine hundred ninety-three thousand, seven hundred eighteen".