845582161 has 4 divisors (see below), whose sum is σ = 845641072. Its totient is φ = 845523252.

The previous prime is 845582149. The next prime is 845582173. The reversal of 845582161 is 161285548.

It is a happy number.

845582161 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, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is an interprime number because it is at equal distance from previous prime (845582149) and next prime (845582173).

It is a cyclic number.

It is not a de Polignac number, because 845582161 - 2²¹ = 843485009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (845582131) 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, 7690 + ... + 41836.

It is an arithmetic number, because the mean of its divisors is an integer number (211410268).

Almost surely, 2^845582161 is an apocalyptic number.

It is an amenable number.

845582161 is a deficient number, since it is larger than the sum of its proper divisors (58911).

845582161 is a wasteful number, since it uses less digits than its factorization.

845582161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58910.

The product of its digits is 76800, while the sum is 40.

The square root of 845582161 is about 29078.8954570149. The cubic root of 845582161 is about 945.6242568673.

The spelling of 845582161 in words is "eight hundred forty-five million, five hundred eighty-two thousand, one hundred sixty-one".