845515845 has 24 divisors (see below), whose sum is σ = 1466556000. Its totient is φ = 450635616.

The previous prime is 845515831. The next prime is 845515849. The reversal of 845515845 is 548515548.

845515845 is a `hidden beast` number, since 8 + 4 + 551 + 58 + 45 = 666.

It is not a de Polignac number, because 845515845 - 2⁴ = 845515829 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 845515845.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (845515849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 70926 + ... + 81984.

It is an arithmetic number, because the mean of its divisors is an integer number (61106500).

Almost surely, 2^845515845 is an apocalyptic number.

It is an amenable number.

845515845 is a deficient number, since it is larger than the sum of its proper divisors (621040155).

845515845 is a wasteful number, since it uses less digits than its factorization.

845515845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12769 (or 12766 counting only the distinct ones).

The product of its digits is 640000, while the sum is 45.

The square root of 845515845 is about 29077.7551575083. The cubic root of 845515845 is about 945.5995355725.

The spelling of 845515845 in words is "eight hundred forty-five million, five hundred fifteen thousand, eight hundred forty-five".