809858411449 has 4 divisors (see below), whose sum is σ = 809876331664. Its totient is φ = 809840491236.

The previous prime is 809858411441. The next prime is 809858411543. The reversal of 809858411449 is 944114858908.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 809858411449 - 2³ = 809858411441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (809858411441) by changing a digit.

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, 8892147 + ... + 8982760.

It is an arithmetic number, because the mean of its divisors is an integer number (202469082916).

Almost surely, 2^809858411449 is an apocalyptic number.

It is an amenable number.

809858411449 is a deficient number, since it is larger than the sum of its proper divisors (17920215).

809858411449 is a wasteful number, since it uses less digits than its factorization.

809858411449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17920214.

The product of its (nonzero) digits is 13271040, while the sum is 61.

The spelling of 809858411449 in words is "eight hundred nine billion, eight hundred fifty-eight million, four hundred eleven thousand, four hundred forty-nine".