2188711738205 has 6 divisors (see below), whose sum is σ = 2626458055578. Its totient is φ = 1750966744080.

The previous prime is 2188711738159. The next prime is 2188711738237. The reversal of 2188711738205 is 5028371178812.

It can be written as a sum of positive squares in 3 ways, for example, as 72329799364 + 2116381938841 = 268942^2 + 1454779^2 .

It is not a de Polignac number, because 2188711738205 - 2¹⁴ = 2188711721821 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 5 ways as a sum of consecutive naturals, for example, 2977295 + ... + 3638915.

It is an arithmetic number, because the mean of its divisors is an integer number (437743009263).

Almost surely, 2^{2188711738205} is an apocalyptic number.

It is an amenable number.

2188711738205 is a deficient number, since it is larger than the sum of its proper divisors (437746317373).

2188711738205 is an frugal number, since it uses more digits than its factorization.

2188711738205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1323247 (or 661626 counting only the distinct ones).

The product of its (nonzero) digits is 1505280, while the sum is 53.

The spelling of 2188711738205 in words is "two trillion, one hundred eighty-eight billion, seven hundred eleven million, seven hundred thirty-eight thousand, two hundred five".