8128227161 has 4 divisors (see below), whose sum is σ = 8145196800. Its totient is φ = 8111257524.

The previous prime is 8128227157. The next prime is 8128227179. The reversal of 8128227161 is 1617228218.

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 8128227161 - 2² = 8128227157 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8128227061) 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, 8484101 + ... + 8485058.

It is an arithmetic number, because the mean of its divisors is an integer number (2036299200).

Almost surely, 2^8128227161 is an apocalyptic number.

It is an amenable number.

8128227161 is a deficient number, since it is larger than the sum of its proper divisors (16969639).

8128227161 is a wasteful number, since it uses less digits than its factorization.

8128227161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16969638.

The product of its digits is 21504, while the sum is 38.

The square root of 8128227161 is about 90156.6811778251. The cubic root of 8128227161 is about 2010.6290087679.

The spelling of 8128227161 in words is "eight billion, one hundred twenty-eight million, two hundred twenty-seven thousand, one hundred sixty-one".