845161485871 has 4 divisors (see below), whose sum is σ = 845184176200. Its totient is φ = 845138795544.

The previous prime is 845161485869. The next prime is 845161485887. The reversal of 845161485871 is 178584161548.

It is a happy number.

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 845161485871 - 2¹ = 845161485869 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 (845161485851) 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, 11289201 + ... + 11363818.

It is an arithmetic number, because the mean of its divisors is an integer number (211296044050).

Almost surely, 2^845161485871 is an apocalyptic number.

845161485871 is a deficient number, since it is larger than the sum of its proper divisors (22690329).

845161485871 is a wasteful number, since it uses less digits than its factorization.

845161485871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22690328.

The product of its digits is 8601600, while the sum is 58.

The spelling of 845161485871 in words is "eight hundred forty-five billion, one hundred sixty-one million, four hundred eighty-five thousand, eight hundred seventy-one".