6442043507 has 2 divisors, whose sum is σ = 6442043508. Its totient is φ = 6442043506.

The previous prime is 6442043467. The next prime is 6442043599. The reversal of 6442043507 is 7053402446.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6442043507 is a prime.

It is not a weakly prime, because it can be changed into another prime (6442048507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3221021753 + 3221021754.

It is an arithmetic number, because the mean of its divisors is an integer number (3221021754).

Almost surely, 2^6442043507 is an apocalyptic number.

6442043507 is a deficient number, since it is larger than the sum of its proper divisors (1).

6442043507 is an equidigital number, since it uses as much as digits as its factorization.

6442043507 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 80640, while the sum is 35.

The square root of 6442043507 is about 80262.3417737110. The cubic root of 6442043507 is about 1860.6922604343.

The spelling of 6442043507 in words is "six billion, four hundred forty-two million, forty-three thousand, five hundred seven".