1818668136 has 32 divisors (see below), whose sum is σ = 4548529440. Its totient is φ = 605974848.

The previous prime is 1818668081. The next prime is 1818668147. The reversal of 1818668136 is 6318668181.

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50095 + ... + 78401.

It is an arithmetic number, because the mean of its divisors is an integer number (142141545).

Almost surely, 2^1818668136 is an apocalyptic number.

It is an amenable number.

1818668136 is an abundant number, since it is smaller than the sum of its proper divisors (2729861304).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1818668136 is a wasteful number, since it uses less digits than its factorization.

1818668136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30993 (or 30989 counting only the distinct ones).

The product of its digits is 331776, while the sum is 48.

The square root of 1818668136 is about 42645.8454717455. The cubic root of 1818668136 is about 1220.6312544351.

The spelling of 1818668136 in words is "one billion, eight hundred eighteen million, six hundred sixty-eight thousand, one hundred thirty-six".