871072323721643 has 4 divisors (see below), whose sum is σ = 871158902831568. Its totient is φ = 870985744611720.

The previous prime is 871072323721601. The next prime is 871072323721681. The reversal of 871072323721643 is 346127323270178.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 871072323721643 - 2¹⁶ = 871072323656107 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (871072323727643) 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, 43289539871 + ... + 43289559992.

It is an arithmetic number, because the mean of its divisors is an integer number (217789725707892).

Almost surely, 2^{871072323721643} is an apocalyptic number.

871072323721643 is a deficient number, since it is larger than the sum of its proper divisors (86579109925).

871072323721643 is a wasteful number, since it uses less digits than its factorization.

871072323721643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86579109924.

The product of its (nonzero) digits is 14224896, while the sum is 56.

The spelling of 871072323721643 in words is "eight hundred seventy-one trillion, seventy-two billion, three hundred twenty-three million, seven hundred twenty-one thousand, six hundred forty-three".