2118236051688 has 32 divisors (see below), whose sum is σ = 5478196687200. Its totient is φ = 681731142848.

The previous prime is 2118236051681. The next prime is 2118236051801. The reversal of 2118236051688 is 8861506328112.

It is a self number, because there is not a number n which added to its sum of digits gives 2118236051688.

It is not an unprimeable number, because it can be changed into a prime (2118236051681) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1521720606 + ... + 1521721997.

It is an arithmetic number, because the mean of its divisors is an integer number (171193646475).

Almost surely, 2^{2118236051688} is an apocalyptic number.

It is an amenable number.

2118236051688 is an abundant number, since it is smaller than the sum of its proper divisors (3359960635512).

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

2118236051688 is a wasteful number, since it uses less digits than its factorization.

2118236051688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3043442641 (or 3043442637 counting only the distinct ones).

The product of its (nonzero) digits is 1105920, while the sum is 51.

The spelling of 2118236051688 in words is "two trillion, one hundred eighteen billion, two hundred thirty-six million, fifty-one thousand, six hundred eighty-eight".