81282224874718 has 16 divisors (see below), whose sum is σ = 141303505618944. Its totient is φ = 34344602059320.

The previous prime is 81282224874691. The next prime is 81282224874731. The reversal of 81282224874718 is 81747842228218.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 81282224874718.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40886430030 + ... + 40886432017.

It is an arithmetic number, because the mean of its divisors is an integer number (8831469101184).

Almost surely, 2^{81282224874718} is an apocalyptic number.

81282224874718 is a deficient number, since it is larger than the sum of its proper divisors (60021280744226).

81282224874718 is a wasteful number, since it uses less digits than its factorization.

81282224874718 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81772862127.

The product of its digits is 51380224, while the sum is 64.

The spelling of 81282224874718 in words is "eighty-one trillion, two hundred eighty-two billion, two hundred twenty-four million, eight hundred seventy-four thousand, seven hundred eighteen".