2108139638087 has 4 divisors (see below), whose sum is σ = 2409302443536. Its totient is φ = 1806976832640.

The previous prime is 2108139638071. The next prime is 2108139638093. The reversal of 2108139638087 is 7808369318012.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 2108139638087 - 2⁴ = 2108139638071 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2108139638027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 150581402714 + ... + 150581402727.

It is an arithmetic number, because the mean of its divisors is an integer number (602325610884).

Almost surely, 2^{2108139638087} is an apocalyptic number.

2108139638087 is a deficient number, since it is larger than the sum of its proper divisors (301162805449).

2108139638087 is an equidigital number, since it uses as much as digits as its factorization.

2108139638087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 301162805448.

The product of its (nonzero) digits is 3483648, while the sum is 56.

The spelling of 2108139638087 in words is "two trillion, one hundred eight billion, one hundred thirty-nine million, six hundred thirty-eight thousand, eighty-seven".