81116328833760 has 96 divisors (see below), whose sum is σ = 278745202737792. Its totient is φ = 19664564564480.

The previous prime is 81116328833731. The next prime is 81116328833773. The reversal of 81116328833760 is 6733882361118.

It is a tau number, because it is divible by the number of its divisors (96).

It is a self number, because there is not a number n which added to its sum of digits gives 81116328833760.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7681465254 + ... + 7681475813.

It is an arithmetic number, because the mean of its divisors is an integer number (2903595861852).

Almost surely, 2^{81116328833760} is an apocalyptic number.

81116328833760 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

81116328833760 is an abundant number, since it is smaller than the sum of its proper divisors (197628873904032).

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

81116328833760 is a wasteful number, since it uses less digits than its factorization.

81116328833760 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15362941096 (or 15362941088 counting only the distinct ones).

The product of its (nonzero) digits is 6967296, while the sum is 57.

The spelling of 81116328833760 in words is "eighty-one trillion, one hundred sixteen billion, three hundred twenty-eight million, eight hundred thirty-three thousand, seven hundred sixty".