2173565071061 has 4 divisors (see below), whose sum is σ = 2226578853324. Its totient is φ = 2120551288800.

The previous prime is 2173565071037. The next prime is 2173565071063. The reversal of 2173565071061 is 1601705653712.

It is a happy number.

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 388588910161 + 1784976160900 = 623369^2 + 1336030^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2173565071061 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 (2173565071063) 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, 26506891070 + ... + 26506891151.

It is an arithmetic number, because the mean of its divisors is an integer number (556644713331).

Almost surely, 2^{2173565071061} is an apocalyptic number.

It is an amenable number.

2173565071061 is a deficient number, since it is larger than the sum of its proper divisors (53013782263).

2173565071061 is an equidigital number, since it uses as much as digits as its factorization.

2173565071061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53013782262.

The product of its (nonzero) digits is 264600, while the sum is 44.

The spelling of 2173565071061 in words is "two trillion, one hundred seventy-three billion, five hundred sixty-five million, seventy-one thousand, sixty-one".