2117055544165 has 4 divisors (see below), whose sum is σ = 2540466653004. Its totient is φ = 1693644435328.

The previous prime is 2117055544151. The next prime is 2117055544211. The reversal of 2117055544165 is 5614455507112.

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 590412434689 + 1526643109476 = 768383^2 + 1235574^2 .

It is a cyclic number.

It is not a de Polignac number, because 2117055544165 - 2¹⁷ = 2117055413093 is a prime.

It is a Duffinian 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, 211705554412 + ... + 211705554421.

It is an arithmetic number, because the mean of its divisors is an integer number (635116663251).

Almost surely, 2^{2117055544165} is an apocalyptic number.

It is an amenable number.

2117055544165 is a deficient number, since it is larger than the sum of its proper divisors (423411108839).

2117055544165 is an equidigital number, since it uses as much as digits as its factorization.

2117055544165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 423411108838.

The product of its (nonzero) digits is 840000, while the sum is 46.

The spelling of 2117055544165 in words is "two trillion, one hundred seventeen billion, fifty-five million, five hundred forty-four thousand, one hundred sixty-five".