998883692218 has 4 divisors (see below), whose sum is σ = 1498325538330. Its totient is φ = 499441846108.

The previous prime is 998883692167. The next prime is 998883692263. The reversal of 998883692218 is 812296388899.

998883692218 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 812296388899 = 19 ⋅42752441521.

It can be written as a sum of positive squares in only one way, i.e., 998214797449 + 668894769 = 999107^2 + 25863^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 249720923053 + ... + 249720923056.

Almost surely, 2^998883692218 is an apocalyptic number.

998883692218 is a deficient number, since it is larger than the sum of its proper divisors (499441846112).

998883692218 is a wasteful number, since it uses less digits than its factorization.

998883692218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 499441846111.

The product of its digits is 214990848, while the sum is 73.

The spelling of 998883692218 in words is "nine hundred ninety-eight billion, eight hundred eighty-three million, six hundred ninety-two thousand, two hundred eighteen".