8671320905 has 16 divisors (see below), whose sum is σ = 11216212560. Its totient is φ = 6397609728.

The previous prime is 8671320901. The next prime is 8671320979. The reversal of 8671320905 is 5090231768.

It can be written as a sum of positive squares in 8 ways, for example, as 1581175696 + 7090145209 = 39764^2 + 84203^2 .

It is a cyclic number.

It is not a de Polignac number, because 8671320905 - 2² = 8671320901 is a prime.

It is not an unprimeable number, because it can be changed into a prime (8671320901) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11939 + ... + 132231.

It is an arithmetic number, because the mean of its divisors is an integer number (701013285).

Almost surely, 2^8671320905 is an apocalyptic number.

It is an amenable number.

8671320905 is a deficient number, since it is larger than the sum of its proper divisors (2544891655).

8671320905 is a wasteful number, since it uses less digits than its factorization.

8671320905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121420.

The product of its (nonzero) digits is 90720, while the sum is 41.

The square root of 8671320905 is about 93119.9275397055. The cubic root of 8671320905 is about 2054.4476826057.

The spelling of 8671320905 in words is "eight billion, six hundred seventy-one million, three hundred twenty thousand, nine hundred five".