81068343122 has 54 divisors (see below), whose sum is σ = 140031086319. Its totient is φ = 35176552320.

The previous prime is 81068343121. The next prime is 81068343143. The reversal of 81068343122 is 22134386018.

It is a happy number.

It can be written as a sum of positive squares in 5 ways, for example, as 32865701521 + 48202641601 = 181289^2 + 219551^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=201331.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (81068343121) 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 26 ways as a sum of consecutive naturals, for example, 88987847 + ... + 88988757.

Almost surely, 2^81068343122 is an apocalyptic number.

81068343122 is a deficient number, since it is larger than the sum of its proper divisors (58962743197).

81068343122 is an equidigital number, since it uses as much as digits as its factorization.

81068343122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1884 (or 943 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 38.

The spelling of 81068343122 in words is "eighty-one billion, sixty-eight million, three hundred forty-three thousand, one hundred twenty-two".