2139638613 has 16 divisors (see below), whose sum is σ = 3262001280. Its totient is φ = 1222050816.

The previous prime is 2139638609. The next prime is 2139638629. The reversal of 2139638613 is 3168369312.

It is not a de Polignac number, because 2139638613 - 2² = 2139638609 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2139638603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20781 + ... + 68637.

It is an arithmetic number, because the mean of its divisors is an integer number (203875080).

Almost surely, 2^2139638613 is an apocalyptic number.

It is an amenable number.

2139638613 is a deficient number, since it is larger than the sum of its proper divisors (1122362667).

2139638613 is a wasteful number, since it uses less digits than its factorization.

2139638613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49996.

The product of its digits is 139968, while the sum is 42.

The square root of 2139638613 is about 46256.2278293421. The cubic root of 2139638613 is about 1288.5861988140.

The spelling of 2139638613 in words is "two billion, one hundred thirty-nine million, six hundred thirty-eight thousand, six hundred thirteen".