1918655118 has 12 divisors (see below), whose sum is σ = 4157086128. Its totient is φ = 639551700.

The previous prime is 1918655111. The next prime is 1918655149. The reversal of 1918655118 is 8115568191.

1918655118 is a `hidden beast` number, since 1 + 9 + 1 + 86 + 551 + 18 = 666.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1918655111) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 53295958 + ... + 53295993.

It is an arithmetic number, because the mean of its divisors is an integer number (346423844).

Almost surely, 2^1918655118 is an apocalyptic number.

1918655118 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1918655118 is an abundant number, since it is smaller than the sum of its proper divisors (2238431010).

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

1918655118 is a wasteful number, since it uses less digits than its factorization.

1918655118 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106591959 (or 106591956 counting only the distinct ones).

The product of its digits is 86400, while the sum is 45.

The square root of 1918655118 is about 43802.4556160953. The cubic root of 1918655118 is about 1242.6027359125.

The spelling of 1918655118 in words is "one billion, nine hundred eighteen million, six hundred fifty-five thousand, one hundred eighteen".