81023422432018 has 64 divisors (see below), whose sum is σ = 134466542964864. Its totient is φ = 36309813696000.

The previous prime is 81023422431923. The next prime is 81023422432019.

81023422432018 is nontrivially palindromic in base 10.

It is not an unprimeable number, because it can be changed into a prime (81023422432019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 688488430 + ... + 688606102.

It is an arithmetic number, because the mean of its divisors is an integer number (2101039733826).

Almost surely, 2^{81023422432018} is an apocalyptic number.

81023422432018 is a deficient number, since it is larger than the sum of its proper divisors (53443120532846).

81023422432018 is a wasteful number, since it uses less digits than its factorization.

81023422432018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119371.

The product of its (nonzero) digits is 147456, while the sum is 40.

The spelling of 81023422432018 in words is "eighty-one trillion, twenty-three billion, four hundred twenty-two million, four hundred thirty-two thousand, eighteen".