81298455489218 has 8 divisors (see below), whose sum is σ = 133033836255120. Its totient is φ = 36953843404180.

The previous prime is 81298455489203. The next prime is 81298455489241.

81298455489218 is nontrivially palindromic in base 10.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1847692170188 + ... + 1847692170231.

It is an arithmetic number, because the mean of its divisors is an integer number (16629229531890).

Almost surely, 2^{81298455489218} is an apocalyptic number.

81298455489218 is a deficient number, since it is larger than the sum of its proper divisors (51735380765902).

81298455489218 is a wasteful number, since it uses less digits than its factorization.

81298455489218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3695384340432.

The product of its digits is 530841600, while the sum is 74.

The spelling of 81298455489218 in words is "eighty-one trillion, two hundred ninety-eight billion, four hundred fifty-five million, four hundred eighty-nine thousand, two hundred eighteen".