2138662618 has 8 divisors (see below), whose sum is σ = 3231073440. Its totient is φ = 1061638140.

The previous prime is 2138662597. The next prime is 2138662651. The reversal of 2138662618 is 8162668312.

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

It is a super-2 number, since 2×2138662618² = 9147755587261227848, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3846238 + ... + 3846793.

It is an arithmetic number, because the mean of its divisors is an integer number (403884180).

Almost surely, 2^2138662618 is an apocalyptic number.

2138662618 is a deficient number, since it is larger than the sum of its proper divisors (1092410822).

2138662618 is a wasteful number, since it uses less digits than its factorization.

2138662618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7693172.

The product of its digits is 165888, while the sum is 43.

The square root of 2138662618 is about 46245.6767492919. The cubic root of 2138662618 is about 1288.3902397154.

The spelling of 2138662618 in words is "two billion, one hundred thirty-eight million, six hundred sixty-two thousand, six hundred eighteen".