2138516618 has 8 divisors (see below), whose sum is σ = 3666028512. Its totient is φ = 916507116.

The previous prime is 2138516603. The next prime is 2138516647. The reversal of 2138516618 is 8166158312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 76375580 + ... + 76375607.

It is an arithmetic number, because the mean of its divisors is an integer number (458253564).

Almost surely, 2^2138516618 is an apocalyptic number.

2138516618 is a deficient number, since it is larger than the sum of its proper divisors (1527511894).

2138516618 is a wasteful number, since it uses less digits than its factorization.

2138516618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152751196.

The product of its digits is 69120, while the sum is 41.

The square root of 2138516618 is about 46244.0981964185. The cubic root of 2138516618 is about 1288.3609208857.

The spelling of 2138516618 in words is "two billion, one hundred thirty-eight million, five hundred sixteen thousand, six hundred eighteen".