8643376561443 has 64 divisors (see below), whose sum is σ = 13442362117632. Its totient is φ = 4892090112000.

The previous prime is 8643376561433. The next prime is 8643376561481. The reversal of 8643376561443 is 3441656733468.

It is a Cunningham number, because it is equal to 2939962²-1.

It is not a de Polignac number, because 8643376561443 - 2¹⁷ = 8643376430371 is a prime.

It is not an unprimeable number, because it can be changed into a prime (8643376561433) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 8329896 + ... + 9309882.

It is an arithmetic number, because the mean of its divisors is an integer number (210036908088).

Almost surely, 2^{8643376561443} is an apocalyptic number.

8643376561443 is a deficient number, since it is larger than the sum of its proper divisors (4798985556189).

8643376561443 is a wasteful number, since it uses less digits than its factorization.

8643376561443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 980324.

The product of its digits is 104509440, while the sum is 60.

The spelling of 8643376561443 in words is "eight trillion, six hundred forty-three billion, three hundred seventy-six million, five hundred sixty-one thousand, four hundred forty-three".