8009009009009 has 4 divisors (see below), whose sum is σ = 8009765371380. Its totient is φ = 8008252646640.

The previous prime is 8009009008933. The next prime is 8009009009041. The reversal of 8009009009009 is 9009009009008.

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 1269896848609 + 6739112160400 = 1126897^2 + 2595980^2 .

It is a cyclic number.

It is not a de Polignac number, because 8009009009009 - 2²⁸ = 8008740573553 is a prime.

It is a Duffinian number.

8009009009009 is a modest number, since divided by 9009009 gives 8009 as remainder.

It is not an unprimeable number, because it can be changed into a prime (8009009009059) 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, 378165302 + ... + 378186479.

It is an arithmetic number, because the mean of its divisors is an integer number (2002441342845).

Almost surely, 2^{8009009009009} is an apocalyptic number.

It is an amenable number.

8009009009009 is a deficient number, since it is larger than the sum of its proper divisors (756362371).

8009009009009 is a wasteful number, since it uses less digits than its factorization.

8009009009009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 756362370.

The product of its (nonzero) digits is 52488, while the sum is 44.

Subtracting 8009009009009 from its reverse (9009009009008), we obtain a palindrome (999999999999).

The spelling of 8009009009009 in words is "eight trillion, nine billion, nine million, nine thousand, nine".