818444818 has 4 divisors (see below), whose sum is σ = 1227667230. Its totient is φ = 409222408.

The previous prime is 818444807. The next prime is 818444849.

818444818 is nontrivially palindromic in base 10.

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

It can be written as a sum of positive squares in only one way, i.e., 590344209 + 228100609 = 24297^2 + 15103^2 .

It is a super-2 number, since 2×818444818² = 1339703840222106248, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 204611203 + ... + 204611206.

Almost surely, 2^818444818 is an apocalyptic number.

818444818 is a deficient number, since it is larger than the sum of its proper divisors (409222412).

818444818 is a wasteful number, since it uses less digits than its factorization.

818444818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 409222411.

The product of its digits is 262144, while the sum is 46.

The square root of 818444818 is about 28608.4745835915. The cubic root of 818444818 is about 935.3980662742.

The spelling of 818444818 in words is "eight hundred eighteen million, four hundred forty-four thousand, eight hundred eighteen".