809016722369 has 4 divisors (see below), whose sum is σ = 844191362496. Its totient is φ = 773842082244.

The previous prime is 809016722281. The next prime is 809016722387. The reversal of 809016722369 is 963227610908.

It is a happy number.

809016722369 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 809016722369 - 2⁸ = 809016722113 is a prime.

It is a super-2 number, since 2×809016722369² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 809016722369.

It is not an unprimeable number, because it can be changed into a prime (809016722069) 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, 17587320029 + ... + 17587320074.

It is an arithmetic number, because the mean of its divisors is an integer number (211047840624).

Almost surely, 2^809016722369 is an apocalyptic number.

It is an amenable number.

809016722369 is a deficient number, since it is larger than the sum of its proper divisors (35174640127).

809016722369 is a wasteful number, since it uses less digits than its factorization.

809016722369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35174640126.

The product of its (nonzero) digits is 1959552, while the sum is 53.

The spelling of 809016722369 in words is "eight hundred nine billion, sixteen million, seven hundred twenty-two thousand, three hundred sixty-nine".