8209104404005 has 4 divisors (see below), whose sum is σ = 9850925284812. Its totient is φ = 6567283523200.

The previous prime is 8209104403991. The next prime is 8209104404021. The reversal of 8209104404005 is 5004044019028.

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

It can be written as a sum of positive squares in 2 ways, for example, as 5113197292644 + 3095907111361 = 2261238^2 + 1759519^2 .

It is a de Polignac number, because none of the positive numbers 2^k-8209104404005 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 820910440396 + ... + 820910440405.

It is an arithmetic number, because the mean of its divisors is an integer number (2462731321203).

Almost surely, 2^{8209104404005} is an apocalyptic number.

It is an amenable number.

8209104404005 is a deficient number, since it is larger than the sum of its proper divisors (1641820880807).

8209104404005 is a wasteful number, since it uses less digits than its factorization.

8209104404005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1641820880806.

The product of its (nonzero) digits is 46080, while the sum is 37.

The spelling of 8209104404005 in words is "eight trillion, two hundred nine billion, one hundred four million, four hundred four thousand, five".