8120325605 has 32 divisors (see below), whose sum is σ = 11646595584. Its totient is φ = 5314231296.

The previous prime is 8120325589. The next prime is 8120325607. The reversal of 8120325605 is 5065230218.

It is a cyclic number.

It is not a de Polignac number, because 8120325605 - 2⁴ = 8120325589 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8120325607) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 356849 + ... + 378921.

It is an arithmetic number, because the mean of its divisors is an integer number (363956112).

Almost surely, 2^8120325605 is an apocalyptic number.

8120325605 is the 73577-th pentagonal number.

It is an amenable number.

8120325605 is a deficient number, since it is larger than the sum of its proper divisors (3526269979).

8120325605 is a wasteful number, since it uses less digits than its factorization.

8120325605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22565.

The product of its (nonzero) digits is 14400, while the sum is 32.

The square root of 8120325605 is about 90112.8492780025. The cubic root of 8120325605 is about 2009.9772779458.

The spelling of 8120325605 in words is "eight billion, one hundred twenty million, three hundred twenty-five thousand, six hundred five".