809605220163 has 32 divisors (see below), whose sum is σ = 1106214278400. Its totient is φ = 526545862656.

The previous prime is 809605220089. The next prime is 809605220167. The reversal of 809605220163 is 361022506908.

It is not a de Polignac number, because 809605220163 - 2⁹ = 809605219651 is a prime.

It is a super-2 number, since 2×809605220163² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (809605220167) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 17018056 + ... + 17065562.

It is an arithmetic number, because the mean of its divisors is an integer number (34569196200).

Almost surely, 2^809605220163 is an apocalyptic number.

809605220163 is a gapful number since it is divisible by the number (83) formed by its first and last digit.

809605220163 is a deficient number, since it is larger than the sum of its proper divisors (296609058237).

809605220163 is a wasteful number, since it uses less digits than its factorization.

809605220163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48451.

The product of its (nonzero) digits is 155520, while the sum is 42.

The spelling of 809605220163 in words is "eight hundred nine billion, six hundred five million, two hundred twenty thousand, one hundred sixty-three".