6445449079943 has 4 divisors (see below), whose sum is σ = 6445460153568. Its totient is φ = 6445438006320.

The previous prime is 6445449079933. The next prime is 6445449079963. The reversal of 6445449079943 is 3499709445446.

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 6445449079943 - 2¹⁰ = 6445449078919 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6445449079903) 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, 4612271 + ... + 5844992.

It is an arithmetic number, because the mean of its divisors is an integer number (1611365038392).

Almost surely, 2^{6445449079943} is an apocalyptic number.

6445449079943 is a deficient number, since it is larger than the sum of its proper divisors (11073625).

6445449079943 is a wasteful number, since it uses less digits than its factorization.

6445449079943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11073624.

The product of its (nonzero) digits is 470292480, while the sum is 68.

The spelling of 6445449079943 in words is "six trillion, four hundred forty-five billion, four hundred forty-nine million, seventy-nine thousand, nine hundred forty-three".