818933778226 has 8 divisors (see below), whose sum is σ = 1228778297964. Its totient is φ = 409341012240.

The previous prime is 818933778217. The next prime is 818933778233. The reversal of 818933778226 is 622877339818.

818933778226 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 780439730625 + 38494047601 = 883425^2 + 196199^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×818933778226² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62930305 + ... + 62943316.

Almost surely, 2^818933778226 is an apocalyptic number.

818933778226 is a deficient number, since it is larger than the sum of its proper divisors (409844519738).

818933778226 is a wasteful number, since it uses less digits than its factorization.

818933778226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125876876.

The product of its digits is 48771072, while the sum is 64.

The spelling of 818933778226 in words is "eight hundred eighteen billion, nine hundred thirty-three million, seven hundred seventy-eight thousand, two hundred twenty-six".