845644686 has 8 divisors (see below), whose sum is σ = 1691289384. Its totient is φ = 281881560.

The previous prime is 845644673. The next prime is 845644697. The reversal of 845644686 is 686446548.

845644686 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

845644686 is an admirable number.

It is a super-2 number, since 2×845644686² = 1430229869920077192, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70470385 + ... + 70470396.

It is an arithmetic number, because the mean of its divisors is an integer number (211411173).

Almost surely, 2^845644686 is an apocalyptic number.

845644686 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

845644686 is a wasteful number, since it uses less digits than its factorization.

845644686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140940786.

The product of its digits is 4423680, while the sum is 51.

The square root of 845644686 is about 29079.9705295587. The cubic root of 845644686 is about 945.6475637684.

The spelling of 845644686 in words is "eight hundred forty-five million, six hundred forty-four thousand, six hundred eighty-six".