2218968178 has 16 divisors (see below), whose sum is σ = 3805424640. Its totient is φ = 950616576.

The previous prime is 2218968161. The next prime is 2218968221. The reversal of 2218968178 is 8718698122.

It is a happy number.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 8175 + ... + 67117.

It is an arithmetic number, because the mean of its divisors is an integer number (237839040).

Almost surely, 2^2218968178 is an apocalyptic number.

2218968178 is a deficient number, since it is larger than the sum of its proper divisors (1586456462).

2218968178 is a wasteful number, since it uses less digits than its factorization.

2218968178 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61641.

The product of its digits is 774144, while the sum is 52.

The square root of 2218968178 is about 47105.9250837939. The cubic root of 2218968178 is about 1304.3186116118.

The spelling of 2218968178 in words is "two billion, two hundred eighteen million, nine hundred sixty-eight thousand, one hundred seventy-eight".