81044773413771 has 16 divisors (see below), whose sum is σ = 109052189312000. Its totient is φ = 53533613393568.

The previous prime is 81044773413733. The next prime is 81044773413817. The reversal of 81044773413771 is 17731437744018.

It is a happy number.

It is not a de Polignac number, because 81044773413771 - 2¹⁵ = 81044773381003 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (81044783413771) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32003160 + ... + 34442586.

It is an arithmetic number, because the mean of its divisors is an integer number (6815761832000).

Almost surely, 2^{81044773413771} is an apocalyptic number.

81044773413771 is a deficient number, since it is larger than the sum of its proper divisors (28007415898229).

81044773413771 is a wasteful number, since it uses less digits than its factorization.

81044773413771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2541138.

The product of its (nonzero) digits is 11063808, while the sum is 57.

The spelling of 81044773413771 in words is "eighty-one trillion, forty-four billion, seven hundred seventy-three million, four hundred thirteen thousand, seven hundred seventy-one".