2118385278 has 32 divisors (see below), whose sum is σ = 4955289600. Its totient is φ = 668963448.

The previous prime is 2118385267. The next prime is 2118385397. The reversal of 2118385278 is 8725838112.

2118385278 is a `hidden beast` number, since 2 + 118 + 3 + 8 + 527 + 8 = 666.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1031326 + ... + 1033377.

It is an arithmetic number, because the mean of its divisors is an integer number (154852800).

Almost surely, 2^2118385278 is an apocalyptic number.

2118385278 is an abundant number, since it is smaller than the sum of its proper divisors (2836904322).

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

2118385278 is a wasteful number, since it uses less digits than its factorization.

2118385278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2064733 (or 2064727 counting only the distinct ones).

The product of its digits is 215040, while the sum is 45.

The square root of 2118385278 is about 46025.9196323115. The cubic root of 2118385278 is about 1284.3054234567.

The spelling of 2118385278 in words is "two billion, one hundred eighteen million, three hundred eighty-five thousand, two hundred seventy-eight".