198133770494 has 16 divisors (see below), whose sum is σ = 324274463856. Its totient is φ = 90045369600.

The previous prime is 198133770491. The next prime is 198133770529. The reversal of 198133770494 is 494077331891.

It is a happy number.

It is a super-3 number, since 3×198133770494³ (a number of 35 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198133770491) 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, 639977 + ... + 897684.

It is an arithmetic number, because the mean of its divisors is an integer number (20267153991).

Almost surely, 2^198133770494 is an apocalyptic number.

198133770494 is a deficient number, since it is larger than the sum of its proper divisors (126140693362).

198133770494 is a wasteful number, since it uses less digits than its factorization.

198133770494 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1543531.

The product of its (nonzero) digits is 4572288, while the sum is 56.

The spelling of 198133770494 in words is "one hundred ninety-eight billion, one hundred thirty-three million, seven hundred seventy thousand, four hundred ninety-four".