8918179978 has 4 divisors (see below), whose sum is σ = 13377269970. Its totient is φ = 4459089988.

The previous prime is 8918179939. The next prime is 8918179979. The reversal of 8918179978 is 8799718198.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8799718198 = 2 ⋅4399859099.

It can be written as a sum of positive squares in only one way, i.e., 5642563689 + 3275616289 = 75117^2 + 57233^2 .

It is a Smith number, since the sum of its digits (67) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (8918179979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2229544993 + ... + 2229544996.

Almost surely, 2^8918179978 is an apocalyptic number.

8918179978 is a deficient number, since it is larger than the sum of its proper divisors (4459089992).

8918179978 is a wasteful number, since it uses less digits than its factorization.

8918179978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4459089991.

The product of its digits is 18289152, while the sum is 67.

The square root of 8918179978 is about 94436.1158561702. The cubic root of 8918179978 is about 2073.7611981869.

The spelling of 8918179978 in words is "eight billion, nine hundred eighteen million, one hundred seventy-nine thousand, nine hundred seventy-eight".