845821804068 has 48 divisors (see below), whose sum is σ = 2195187207360. Its totient is φ = 281642847552.

The previous prime is 845821804067. The next prime is 845821804133. The reversal of 845821804068 is 860408128548.

845821804068 is a `hidden beast` number, since 8 + 4 + 58 + 2 + 180 + 406 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (845821804063) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4032721 + ... + 4237272.

It is an arithmetic number, because the mean of its divisors is an integer number (45733066820).

Almost surely, 2^845821804068 is an apocalyptic number.

It is an amenable number.

845821804068 is an abundant number, since it is smaller than the sum of its proper divisors (1349365403292).

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

845821804068 is a wasteful number, since it uses less digits than its factorization.

845821804068 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8270953 (or 8270945 counting only the distinct ones).

The product of its (nonzero) digits is 3932160, while the sum is 54.

The spelling of 845821804068 in words is "eight hundred forty-five billion, eight hundred twenty-one million, eight hundred four thousand, sixty-eight".