198117785514 has 16 divisors (see below), whose sum is σ = 432256986720. Its totient is φ = 60035692560.

The previous prime is 198117785513. The next prime is 198117785521. The reversal of 198117785514 is 415587711891.

It is not an unprimeable number, because it can be changed into a prime (198117785513) 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, 1500892249 + ... + 1500892380.

It is an arithmetic number, because the mean of its divisors is an integer number (27016061670).

Almost surely, 2^198117785514 is an apocalyptic number.

198117785514 is an abundant number, since it is smaller than the sum of its proper divisors (234139201206).

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

198117785514 is a wasteful number, since it uses less digits than its factorization.

198117785514 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3001784645.

The product of its digits is 2822400, while the sum is 57.

The spelling of 198117785514 in words is "one hundred ninety-eight billion, one hundred seventeen million, seven hundred eighty-five thousand, five hundred fourteen".