8122812161 has 8 divisors (see below), whose sum is σ = 8157511080. Its totient is φ = 8088137728.

The previous prime is 8122812097. The next prime is 8122812179. The reversal of 8122812161 is 1612182218.

It can be written as a sum of positive squares in 4 ways, for example, as 2012419600 + 6110392561 = 44860^2 + 78169^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 8122812161 - 2⁶ = 8122812097 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (8122815161) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1002635 + ... + 1010703.

It is an arithmetic number, because the mean of its divisors is an integer number (1019688885).

Almost surely, 2^8122812161 is an apocalyptic number.

It is an amenable number.

8122812161 is a deficient number, since it is larger than the sum of its proper divisors (34698919).

8122812161 is a wasteful number, since it uses less digits than its factorization.

8122812161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12243.

The product of its digits is 3072, while the sum is 32.

The square root of 8122812161 is about 90126.6451222944. The cubic root of 8122812161 is about 2010.1824179548.

Adding to 8122812161 its reverse (1612182218), we get a palindrome (9734994379).

The spelling of 8122812161 in words is "eight billion, one hundred twenty-two million, eight hundred twelve thousand, one hundred sixty-one".