8120658909 has 32 divisors (see below), whose sum is σ = 12613386240. Its totient is φ = 4598596800.

The previous prime is 8120658893. The next prime is 8120658979. The reversal of 8120658909 is 9098560218.

It is a happy number.

It is not a de Polignac number, because 8120658909 - 2⁴ = 8120658893 is a prime.

It is a super-2 number, since 2×8120658909² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8120658979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 107197 + ... + 166530.

It is an arithmetic number, because the mean of its divisors is an integer number (394168320).

Almost surely, 2^8120658909 is an apocalyptic number.

It is an amenable number.

8120658909 is a deficient number, since it is larger than the sum of its proper divisors (4492727331).

8120658909 is a wasteful number, since it uses less digits than its factorization.

8120658909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 273801.

The product of its (nonzero) digits is 311040, while the sum is 48.

The square root of 8120658909 is about 90114.6986290250. The cubic root of 8120658909 is about 2010.0047778407.

The spelling of 8120658909 in words is "eight billion, one hundred twenty million, six hundred fifty-eight thousand, nine hundred nine".