2170641011173 has 4 divisors (see below), whose sum is σ = 2170644026668. Its totient is φ = 2170637995680.

The previous prime is 2170641011129. The next prime is 2170641011177. The reversal of 2170641011173 is 3711101460712.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 258731943649 + 1911909067524 = 508657^2 + 1382718^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2170641011173 is a prime.

It is a super-2 number, since 2×2170641011173² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2170641011177) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 273265 + ... + 2101417.

It is an arithmetic number, because the mean of its divisors is an integer number (542661006667).

Almost surely, 2^{2170641011173} is an apocalyptic number.

It is an amenable number.

2170641011173 is a deficient number, since it is larger than the sum of its proper divisors (3015495).

2170641011173 is a wasteful number, since it uses less digits than its factorization.

2170641011173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3015494.

The product of its (nonzero) digits is 7056, while the sum is 34.

Adding to 2170641011173 its reverse (3711101460712), we get a palindrome (5881742471885).

The spelling of 2170641011173 in words is "two trillion, one hundred seventy billion, six hundred forty-one million, eleven thousand, one hundred seventy-three".