8108712081 has 6 divisors (see below), whose sum is σ = 11712584130. Its totient is φ = 5405808048.

The previous prime is 8108711959. The next prime is 8108712089. The reversal of 8108712081 is 1802178018.

It can be written as a sum of positive squares in only one way, i.e., 7400300625 + 708411456 = 86025^2 + 26616^2 .

It is not a de Polignac number, because 8108712081 - 2¹¹ = 8108710033 is a prime.

It is a super-2 number, since 2×8108712081² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (8108712089) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 450483996 + ... + 450484013.

It is an arithmetic number, because the mean of its divisors is an integer number (1952097355).

Almost surely, 2^8108712081 is an apocalyptic number.

It is an amenable number.

8108712081 is a deficient number, since it is larger than the sum of its proper divisors (3603872049).

8108712081 is a wasteful number, since it uses less digits than its factorization.

8108712081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 900968015 (or 900968012 counting only the distinct ones).

The product of its (nonzero) digits is 7168, while the sum is 36.

The square root of 8108712081 is about 90048.3874425300. The cubic root of 8108712081 is about 2009.0186112810.

The spelling of 8108712081 in words is "eight billion, one hundred eight million, seven hundred twelve thousand, eighty-one".