2118338577 has 6 divisors (see below), whose sum is σ = 3059822402. Its totient is φ = 1412225712.

The previous prime is 2118338491. The next prime is 2118338587. The reversal of 2118338577 is 7758338112.

2118338577 is a `hidden beast` number, since 21 + 183 + 385 + 77 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1128355281 + 989983296 = 33591^2 + 31464^2 .

It is not a de Polignac number, because 2118338577 - 2¹² = 2118334481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2118338587) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 117685468 + ... + 117685485.

Almost surely, 2^2118338577 is an apocalyptic number.

It is an amenable number.

2118338577 is a deficient number, since it is larger than the sum of its proper divisors (941483825).

2118338577 is a wasteful number, since it uses less digits than its factorization.

2118338577 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 235370959 (or 235370956 counting only the distinct ones).

The product of its digits is 282240, while the sum is 45.

The square root of 2118338577 is about 46025.4122958176. The cubic root of 2118338577 is about 1284.2959856412.

The spelling of 2118338577 in words is "two billion, one hundred eighteen million, three hundred thirty-eight thousand, five hundred seventy-seven".