680811134081 has 8 divisors (see below), whose sum is σ = 737519574120. Its totient is φ = 628441044816.

The previous prime is 680811134041. The next prime is 680811134099. The reversal of 680811134081 is 180431118086.

It can be written as a sum of positive squares in 4 ways, for example, as 196972641856 + 483838492225 = 443816^2 + 695585^2 .

It is a de Polignac number, because none of the positive numbers 2^k-680811134081 is a prime.

It is a super-2 number, since 2×680811134081² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (680811134041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 154938890 + ... + 154943283.

It is an arithmetic number, because the mean of its divisors is an integer number (92189946765).

Almost surely, 2^680811134081 is an apocalyptic number.

It is an amenable number.

680811134081 is a deficient number, since it is larger than the sum of its proper divisors (56708440039).

680811134081 is an equidigital number, since it uses as much as digits as its factorization.

680811134081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 309882212 (or 309882186 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 41.

The spelling of 680811134081 in words is "six hundred eighty billion, eight hundred eleven million, one hundred thirty-four thousand, eighty-one".