8918772778198 has 4 divisors (see below), whose sum is σ = 13378159167300. Its totient is φ = 4459386389098.

The previous prime is 8918772778183. The next prime is 8918772778199.

8918772778198 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8918772778199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2229693194548 + ... + 2229693194551.

It is an arithmetic number, because the mean of its divisors is an integer number (3344539791825).

Almost surely, 2^{8918772778198} is an apocalyptic number.

8918772778198 is a deficient number, since it is larger than the sum of its proper divisors (4459386389102).

8918772778198 is a wasteful number, since it uses less digits than its factorization.

8918772778198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4459386389101.

The product of its digits is 1593188352, while the sum is 82.

The spelling of 8918772778198 in words is "eight trillion, nine hundred eighteen billion, seven hundred seventy-two million, seven hundred seventy-eight thousand, one hundred ninety-eight".