8544404643839 has 16 divisors (see below), whose sum is σ = 8867593324800. Its totient is φ = 8223123519744.

The previous prime is 8544404643833. The next prime is 8544404643851. The reversal of 8544404643839 is 9383464044458.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 8544404643839 - 2⁴ = 8544404643823 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 (8544404643833) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 162294482 + ... + 162347120.

It is an arithmetic number, because the mean of its divisors is an integer number (554224582800).

Almost surely, 2^{8544404643839} is an apocalyptic number.

8544404643839 is a deficient number, since it is larger than the sum of its proper divisors (323188680961).

8544404643839 is a wasteful number, since it uses less digits than its factorization.

8544404643839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70642.

The product of its (nonzero) digits is 159252480, while the sum is 62.

The spelling of 8544404643839 in words is "eight trillion, five hundred forty-four billion, four hundred four million, six hundred forty-three thousand, eight hundred thirty-nine".