4445316643 has 2 divisors, whose sum is σ = 4445316644. Its totient is φ = 4445316642.

The previous prime is 4445316613. The next prime is 4445316671. The reversal of 4445316643 is 3466135444.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4445316643 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 4445316596 and 4445316605.

It is not a weakly prime, because it can be changed into another prime (4445316613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2222658321 + 2222658322.

It is an arithmetic number, because the mean of its divisors is an integer number (2222658322).

Almost surely, 2^4445316643 is an apocalyptic number.

4445316643 is a deficient number, since it is larger than the sum of its proper divisors (1).

4445316643 is an equidigital number, since it uses as much as digits as its factorization.

4445316643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 414720, while the sum is 40.

The square root of 4445316643 is about 66673.2078349317. The cubic root of 4445316643 is about 1644.2489271827.

The spelling of 4445316643 in words is "four billion, four hundred forty-five million, three hundred sixteen thousand, six hundred forty-three".