8228736161 has 4 divisors (see below), whose sum is σ = 8238056112. Its totient is φ = 8219416212.

The previous prime is 8228736157. The next prime is 8228736181. The reversal of 8228736161 is 1616378228.

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 8228736161 - 2² = 8228736157 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 (8228736181) 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, 4658651 + ... + 4660416.

It is an arithmetic number, because the mean of its divisors is an integer number (2059514028).

Almost surely, 2^8228736161 is an apocalyptic number.

It is an amenable number.

8228736161 is a deficient number, since it is larger than the sum of its proper divisors (9319951).

8228736161 is an equidigital number, since it uses as much as digits as its factorization.

8228736161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9319950.

The product of its digits is 193536, while the sum is 44.

The square root of 8228736161 is about 90712.3815198344. The cubic root of 8228736161 is about 2018.8825110920.

The spelling of 8228736161 in words is "eight billion, two hundred twenty-eight million, seven hundred thirty-six thousand, one hundred sixty-one".