81414740068 has 12 divisors (see below), whose sum is σ = 142511540220. Its totient is φ = 40697157152.

The previous prime is 81414739997. The next prime is 81414740081. The reversal of 81414740068 is 86004741418.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 20641643584 + 60773096484 = 143672^2 + 246522^2 .

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 2535271 + ... + 2567182.

It is an arithmetic number, because the mean of its divisors is an integer number (11875961685).

Almost surely, 2^81414740068 is an apocalyptic number.

It is an amenable number.

81414740068 is a deficient number, since it is larger than the sum of its proper divisors (61096800152).

81414740068 is a wasteful number, since it uses less digits than its factorization.

81414740068 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5106446 (or 5106444 counting only the distinct ones).

The product of its (nonzero) digits is 172032, while the sum is 43.

The spelling of 81414740068 in words is "eighty-one billion, four hundred fourteen million, seven hundred forty thousand, sixty-eight".