6443405245 has 4 divisors (see below), whose sum is σ = 7732086300. Its totient is φ = 5154724192.

The previous prime is 6443405239. The next prime is 6443405261. The reversal of 6443405245 is 5425043446.

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 2016099801 + 4427305444 = 44901^2 + 66538^2 .

It is a cyclic number.

It is not a de Polignac number, because 6443405245 - 2³ = 6443405237 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 644340520 + ... + 644340529.

It is an arithmetic number, because the mean of its divisors is an integer number (1933021575).

Almost surely, 2^6443405245 is an apocalyptic number.

It is an amenable number.

6443405245 is a deficient number, since it is larger than the sum of its proper divisors (1288681055).

6443405245 is a wasteful number, since it uses less digits than its factorization.

6443405245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1288681054.

The product of its (nonzero) digits is 230400, while the sum is 37.

The square root of 6443405245 is about 80270.8243697547. The cubic root of 6443405245 is about 1860.8233573884.

The spelling of 6443405245 in words is "six billion, four hundred forty-three million, four hundred five thousand, two hundred forty-five".