3965043289643 has 2 divisors, whose sum is σ = 3965043289644. Its totient is φ = 3965043289642.

The previous prime is 3965043289619. The next prime is 3965043289759. The reversal of 3965043289643 is 3469823405693.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 3965043289643 - 2³⁸ = 3690165382699 is a prime.

It is not a weakly prime, because it can be changed into another prime (3965043289243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1982521644821 + 1982521644822.

It is an arithmetic number, because the mean of its divisors is an integer number (1982521644822).

Almost surely, 2^{3965043289643} is an apocalyptic number.

3965043289643 is a deficient number, since it is larger than the sum of its proper divisors (1).

3965043289643 is an equidigital number, since it uses as much as digits as its factorization.

3965043289643 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 100776960, while the sum is 62.

The spelling of 3965043289643 in words is "three trillion, nine hundred sixty-five billion, forty-three million, two hundred eighty-nine thousand, six hundred forty-three".