6442783405 has 16 divisors (see below), whose sum is σ = 8001526320. Its totient is φ = 4974262272.

The previous prime is 6442783379. The next prime is 6442783433. The reversal of 6442783405 is 5043872446.

It can be written as a sum of positive squares in 8 ways, for example, as 813732676 + 5629050729 = 28526^2 + 75027^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6442783405 is a prime.

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 15 ways as a sum of consecutive naturals, for example, 362077 + ... + 379453.

It is an arithmetic number, because the mean of its divisors is an integer number (500095395).

Almost surely, 2^6442783405 is an apocalyptic number.

It is an amenable number.

6442783405 is a deficient number, since it is larger than the sum of its proper divisors (1558742915).

6442783405 is a wasteful number, since it uses less digits than its factorization.

6442783405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19968.

The product of its (nonzero) digits is 645120, while the sum is 43.

The square root of 6442783405 is about 80266.9508888932. The cubic root of 6442783405 is about 1860.7634940305.

The spelling of 6442783405 in words is "six billion, four hundred forty-two million, seven hundred eighty-three thousand, four hundred five".