2173656563711 has 8 divisors (see below), whose sum is σ = 2180701077984. Its totient is φ = 2166612404320.

The previous prime is 2173656563669. The next prime is 2173656563717. The reversal of 2173656563711 is 1173656563712.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2173656563711 - 2³⁸ = 1898778656767 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 (2173656563717) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18393665 + ... + 18511461.

It is an arithmetic number, because the mean of its divisors is an integer number (272587634748).

Almost surely, 2^{2173656563711} is an apocalyptic number.

2173656563711 is a deficient number, since it is larger than the sum of its proper divisors (7044514273).

2173656563711 is a wasteful number, since it uses less digits than its factorization.

2173656563711 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177441.

The product of its digits is 4762800, while the sum is 53.

Subtracting from 2173656563711 its reverse (1173656563712), we obtain a palindrome (999999999999).

The spelling of 2173656563711 in words is "two trillion, one hundred seventy-three billion, six hundred fifty-six million, five hundred sixty-three thousand, seven hundred eleven".