81120329086 has 8 divisors (see below), whose sum is σ = 121720568760. Its totient is φ = 40546806168.

The previous prime is 81120329063. The next prime is 81120329089. The reversal of 81120329086 is 68092302118.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81120329089) 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 3 ways as a sum of consecutive naturals, for example, 6671596 + ... + 6683743.

It is an arithmetic number, because the mean of its divisors is an integer number (15215071095).

Almost surely, 2^81120329086 is an apocalyptic number.

81120329086 is a deficient number, since it is larger than the sum of its proper divisors (40600239674).

81120329086 is a wasteful number, since it uses less digits than its factorization.

81120329086 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13358378.

The product of its (nonzero) digits is 41472, while the sum is 40.

The spelling of 81120329086 in words is "eighty-one billion, one hundred twenty million, three hundred twenty-nine thousand, eighty-six".