804822500161 has 3 divisors (see below), whose sum is σ = 804823397281. Its totient is φ = 804821603042.

The previous prime is 804822500159. The next prime is 804822500179. The reversal of 804822500161 is 161005228408.

The square root of 804822500161 is 897119.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 804822500161 - 2¹ = 804822500159 is a prime.

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 804822500161.

It is not an unprimeable number, because it can be changed into a prime (804822500101) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 448560 + ... + 1345678.

Almost surely, 2^804822500161 is an apocalyptic number.

804822500161 is the 897119-th square number.

804822500161 is the 448560-th centered octagonal number.

It is an amenable number.

804822500161 is a deficient number, since it is larger than the sum of its proper divisors (897120).

804822500161 is an frugal number, since it uses more digits than its factorization.

804822500161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1794238 (or 897119 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 37.

Adding to 804822500161 its reverse (161005228408), we get a palindrome (965827728569).

The spelling of 804822500161 in words is "eight hundred four billion, eight hundred twenty-two million, five hundred thousand, one hundred sixty-one".