845664945 has 8 divisors (see below), whose sum is σ = 1353063936. Its totient is φ = 451021296.

The previous prime is 845664931. The next prime is 845664947. The reversal of 845664945 is 549466548.

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

It is not a de Polignac number, because 845664945 - 2⁷ = 845664817 is a prime.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (845664947) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28188817 + ... + 28188846.

It is an arithmetic number, because the mean of its divisors is an integer number (169132992).

Almost surely, 2^845664945 is an apocalyptic number.

It is an amenable number.

845664945 is a deficient number, since it is larger than the sum of its proper divisors (507398991).

845664945 is a wasteful number, since it uses less digits than its factorization.

845664945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56377671.

The product of its digits is 4147200, while the sum is 51.

The square root of 845664945 is about 29080.3188600125. The cubic root of 845664945 is about 945.6551152934.

The spelling of 845664945 in words is "eight hundred forty-five million, six hundred sixty-four thousand, nine hundred forty-five".