845668871 has 4 divisors (see below), whose sum is σ = 872948544. Its totient is φ = 818389200.

The previous prime is 845668867. The next prime is 845668877. The reversal of 845668871 is 178866548.

845668871 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 845668871 - 2² = 845668867 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 (845668877) 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, 13639790 + ... + 13639851.

It is an arithmetic number, because the mean of its divisors is an integer number (218237136).

Almost surely, 2^845668871 is an apocalyptic number.

845668871 is a deficient number, since it is larger than the sum of its proper divisors (27279673).

845668871 is a wasteful number, since it uses less digits than its factorization.

845668871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27279672.

The product of its digits is 2580480, while the sum is 53.

The square root of 845668871 is about 29080.3863626328. The cubic root of 845668871 is about 945.6565786926.

The spelling of 845668871 in words is "eight hundred forty-five million, six hundred sixty-eight thousand, eight hundred seventy-one".