6443204045 has 4 divisors (see below), whose sum is σ = 7731844860. Its totient is φ = 5154563232.

The previous prime is 6443204041. The next prime is 6443204069. The reversal of 6443204045 is 5404023446.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5404023446 = 2 ⋅2702011723.

It can be written as a sum of positive squares in 2 ways, for example, as 4819275241 + 1623928804 = 69421^2 + 40298^2 .

It is a cyclic number.

It is not a de Polignac number, because 6443204045 - 2² = 6443204041 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6443204041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 644320400 + ... + 644320409.

It is an arithmetic number, because the mean of its divisors is an integer number (1932961215).

Almost surely, 2^6443204045 is an apocalyptic number.

It is an amenable number.

6443204045 is a deficient number, since it is larger than the sum of its proper divisors (1288640815).

6443204045 is a wasteful number, since it uses less digits than its factorization.

6443204045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1288640814.

The product of its (nonzero) digits is 46080, while the sum is 32.

The square root of 6443204045 is about 80269.5711026289. The cubic root of 6443204045 is about 1860.8039886674.

The spelling of 6443204045 in words is "six billion, four hundred forty-three million, two hundred four thousand, forty-five".