81441434081104 has 40 divisors (see below), whose sum is σ = 159437828272320. Its totient is φ = 40296749273088.

The previous prime is 81441434081101. The next prime is 81441434081143. The reversal of 81441434081104 is 40118043414418.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81441434081101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15214642 + ... + 19858705.

It is an arithmetic number, because the mean of its divisors is an integer number (3985945706808).

Almost surely, 2^{81441434081104} is an apocalyptic number.

It is an amenable number.

81441434081104 is a deficient number, since it is larger than the sum of its proper divisors (77996394191216).

81441434081104 is a wasteful number, since it uses less digits than its factorization.

81441434081104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35074867 (or 35074861 counting only the distinct ones).

The product of its (nonzero) digits is 196608, while the sum is 43.

The spelling of 81441434081104 in words is "eighty-one trillion, four hundred forty-one billion, four hundred thirty-four million, eighty-one thousand, one hundred four".