81206304096 has 48 divisors (see below), whose sum is σ = 213390468144. Its totient is φ = 27040333824.

The previous prime is 81206304077. The next prime is 81206304097. The reversal of 81206304096 is 69040360218.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81206304097) 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 7 ways as a sum of consecutive naturals, for example, 352321 + ... + 535296.

It is an arithmetic number, because the mean of its divisors is an integer number (4445634753).

Almost surely, 2^81206304096 is an apocalyptic number.

It is an amenable number.

81206304096 is an abundant number, since it is smaller than the sum of its proper divisors (132184164048).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

81206304096 is a wasteful number, since it uses less digits than its factorization.

81206304096 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 888583 (or 888575 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 39.

The spelling of 81206304096 in words is "eighty-one billion, two hundred six million, three hundred four thousand, ninety-six".