3138187645205 has 4 divisors (see below), whose sum is σ = 3765825174252. Its totient is φ = 2510550116160.

The previous prime is 3138187645193. The next prime is 3138187645249. The reversal of 3138187645205 is 5025467818313.

3138187645205 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in 2 ways, for example, as 489135181924 + 2649052463281 = 699382^2 + 1627591^2 .

It is not a de Polignac number, because 3138187645205 - 2¹² = 3138187641109 is a prime.

It is a Duffinian number.

It is a Curzon number.

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, 313818764516 + ... + 313818764525.

It is an arithmetic number, because the mean of its divisors is an integer number (941456293563).

Almost surely, 2^{3138187645205} is an apocalyptic number.

It is an amenable number.

3138187645205 is a deficient number, since it is larger than the sum of its proper divisors (627637529047).

3138187645205 is an equidigital number, since it uses as much as digits as its factorization.

3138187645205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 627637529046.

The product of its (nonzero) digits is 4838400, while the sum is 53.

The spelling of 3138187645205 in words is "three trillion, one hundred thirty-eight billion, one hundred eighty-seven million, six hundred forty-five thousand, two hundred five".