8445043945 has 16 divisors (see below), whose sum is σ = 10932823440. Its totient is φ = 6225352704.

The previous prime is 8445043939. The next prime is 8445043949. The reversal of 8445043945 is 5493405448.

It can be written as a sum of positive squares in 8 ways, for example, as 1614352041 + 6830691904 = 40179^2 + 82648^2 .

It is a cyclic number.

It is not a de Polignac number, because 8445043945 - 2¹¹ = 8445041897 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 8445043895 and 8445043904.

It is not an unprimeable number, because it can be changed into a prime (8445043949) 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, 77184 + ... + 151153.

It is an arithmetic number, because the mean of its divisors is an integer number (683301465).

Almost surely, 2^8445043945 is an apocalyptic number.

It is an amenable number.

8445043945 is a deficient number, since it is larger than the sum of its proper divisors (2487779495).

8445043945 is a wasteful number, since it uses less digits than its factorization.

8445043945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 228924.

The product of its (nonzero) digits is 1382400, while the sum is 46.

The square root of 8445043945 is about 91896.9202149887. The cubic root of 8445043945 is about 2036.4197699959.

The spelling of 8445043945 in words is "eight billion, four hundred forty-five million, forty-three thousand, nine hundred forty-five".