2138661814 has 8 divisors (see below), whose sum is σ = 3208514760. Its totient is φ = 1069156896.

The previous prime is 2138661809. The next prime is 2138661841. The reversal of 2138661814 is 4181668312.

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

It is a congruent number.

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, 71059 + ... + 96574.

It is an arithmetic number, because the mean of its divisors is an integer number (401064345).

Almost surely, 2^2138661814 is an apocalyptic number.

2138661814 is a deficient number, since it is larger than the sum of its proper divisors (1069852946).

2138661814 is a wasteful number, since it uses less digits than its factorization.

2138661814 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174014.

The product of its digits is 55296, while the sum is 40.

The square root of 2138661814 is about 46245.6680565867. The cubic root of 2138661814 is about 1288.3900782647.

The spelling of 2138661814 in words is "two billion, one hundred thirty-eight million, six hundred sixty-one thousand, eight hundred fourteen".