81282510705675 has 24 divisors (see below), whose sum is σ = 134404094216880. Its totient is φ = 43345185328000.

The previous prime is 81282510705623. The next prime is 81282510705677. The reversal of 81282510705675 is 57650701528218.

It is not a de Polignac number, because 81282510705675 - 2¹⁹ = 81282510181387 is a prime.

It is not an unprimeable number, because it can be changed into a prime (81282510705677) 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 23 ways as a sum of consecutive naturals, for example, 67991580 + ... + 69176729.

It is an arithmetic number, because the mean of its divisors is an integer number (5600170592370).

Almost surely, 2^{81282510705675} is an apocalyptic number.

81282510705675 is a deficient number, since it is larger than the sum of its proper divisors (53121583511205).

81282510705675 is a wasteful number, since it uses less digits than its factorization.

81282510705675 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137176223 (or 137176218 counting only the distinct ones).

The product of its (nonzero) digits is 9408000, while the sum is 57.

The spelling of 81282510705675 in words is "eighty-one trillion, two hundred eighty-two billion, five hundred ten million, seven hundred five thousand, six hundred seventy-five".