1818656118 has 32 divisors (see below), whose sum is σ = 4043020800. Its totient is φ = 605984328.

The previous prime is 1818656113. The next prime is 1818656143. The reversal of 1818656118 is 8116568181.

It is a happy number.

1818656118 is a `hidden beast` number, since 1 + 8 + 1 + 86 + 561 + 1 + 8 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1818656111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 187455 + ... + 196917.

It is an arithmetic number, because the mean of its divisors is an integer number (126344400).

Almost surely, 2^1818656118 is an apocalyptic number.

1818656118 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1818656118 is an abundant number, since it is smaller than the sum of its proper divisors (2224364682).

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

1818656118 is a wasteful number, since it uses less digits than its factorization.

1818656118 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13033 (or 13027 counting only the distinct ones).

The product of its digits is 92160, while the sum is 45.

The square root of 1818656118 is about 42645.7045668142. The cubic root of 1818656118 is about 1220.6285657315.

The spelling of 1818656118 in words is "one billion, eight hundred eighteen million, six hundred fifty-six thousand, one hundred eighteen".