6443546245 has 4 divisors (see below), whose sum is σ = 7732255500. Its totient is φ = 5154836992.

The previous prime is 6443546233. The next prime is 6443546251. The reversal of 6443546245 is 5426453446.

6443546245 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1908466596 + 4535079649 = 43686^2 + 67343^2 .

It is a cyclic number.

It is not a de Polignac number, because 6443546245 - 2⁹ = 6443545733 is a prime.

It is a super-2 number, since 2×6443546245² = 83038576422907200050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 644354620 + ... + 644354629.

It is an arithmetic number, because the mean of its divisors is an integer number (1933063875).

Almost surely, 2^6443546245 is an apocalyptic number.

It is an amenable number.

6443546245 is a deficient number, since it is larger than the sum of its proper divisors (1288709255).

6443546245 is a wasteful number, since it uses less digits than its factorization.

6443546245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1288709254.

The product of its digits is 1382400, while the sum is 43.

The square root of 6443546245 is about 80271.7026417155. The cubic root of 6443546245 is about 1860.8369306554.

The spelling of 6443546245 in words is "six billion, four hundred forty-three million, five hundred forty-six thousand, two hundred forty-five".