8109722915 has 32 divisors (see below), whose sum is σ = 11619127296. Its totient is φ = 5316670080.

The previous prime is 8109722909. The next prime is 8109722917. The reversal of 8109722915 is 5192279018.

It is a happy number.

It is a Cunningham number, because it is equal to 90054²-1.

It is not a de Polignac number, because 8109722915 - 2⁶ = 8109722851 is a prime.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (8109722917) 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, 45029 + ... + 135081.

It is an arithmetic number, because the mean of its divisors is an integer number (363097728).

Almost surely, 2^8109722915 is an apocalyptic number.

8109722915 is a deficient number, since it is larger than the sum of its proper divisors (3509404381).

8109722915 is a wasteful number, since it uses less digits than its factorization.

8109722915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90179.

The product of its (nonzero) digits is 90720, while the sum is 44.

The square root of 8109722915 is about 90053.9999944478. Note that the first 5 decimals coincide. The cubic root of 8109722915 is about 2009.1020893935.

The spelling of 8109722915 in words is "eight billion, one hundred nine million, seven hundred twenty-two thousand, nine hundred fifteen".