6445966967743 has 4 divisors (see below), whose sum is σ = 6450232996368. Its totient is φ = 6441700939120.

The previous prime is 6445966967719. The next prime is 6445966967749. The reversal of 6445966967743 is 3477696695446.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 6445966967743 - 2⁵ = 6445966967711 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6445966967743.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6445966967749) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2133012046 + ... + 2133015067.

It is an arithmetic number, because the mean of its divisors is an integer number (1612558249092).

Almost surely, 2^{6445966967743} is an apocalyptic number.

6445966967743 is a deficient number, since it is larger than the sum of its proper divisors (4266028625).

6445966967743 is a wasteful number, since it uses less digits than its factorization.

6445966967743 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4266028624.

The product of its digits is 4938071040, while the sum is 76.

The spelling of 6445966967743 in words is "six trillion, four hundred forty-five billion, nine hundred sixty-six million, nine hundred sixty-seven thousand, seven hundred forty-three".