81340303505044 has 12 divisors (see below), whose sum is σ = 142345611299584. Its totient is φ = 40670128848024.

The previous prime is 81340303505009. The next prime is 81340303505057. The reversal of 81340303505044 is 44050530304318.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 81340303504988 and 81340303505006.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4161199 + ... + 13416265.

Almost surely, 2^{81340303505044} is an apocalyptic number.

It is an amenable number.

81340303505044 is a deficient number, since it is larger than the sum of its proper divisors (61005307794540).

81340303505044 is a wasteful number, since it uses less digits than its factorization.

81340303505044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11452254 (or 11452252 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 40.

The spelling of 81340303505044 in words is "eighty-one trillion, three hundred forty billion, three hundred three million, five hundred five thousand, forty-four".