2118155706 has 24 divisors (see below), whose sum is σ = 4675930740. Its totient is φ = 692729856.

The previous prime is 2118155651. The next prime is 2118155713. The reversal of 2118155706 is 6075518112.

2118155706 is a `hidden beast` number, since 2 + 1 + 1 + 81 + 5 + 570 + 6 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1991390625 + 126765081 = 44625^2 + 11259^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1109191 + ... + 1111098.

Almost surely, 2^2118155706 is an apocalyptic number.

2118155706 is an abundant number, since it is smaller than the sum of its proper divisors (2557775034).

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

2118155706 is a wasteful number, since it uses less digits than its factorization.

2118155706 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2220350 (or 2220347 counting only the distinct ones).

The product of its (nonzero) digits is 16800, while the sum is 36.

The square root of 2118155706 is about 46023.4256221764. The cubic root of 2118155706 is about 1284.2590278649.

The spelling of 2118155706 in words is "two billion, one hundred eighteen million, one hundred fifty-five thousand, seven hundred six".