81268120882880 has 56 divisors (see below), whose sum is σ = 193529480516592. Its totient is φ = 32505607590912.

The previous prime is 81268120882877. The next prime is 81268120882891. The reversal of 81268120882880 is 8828802186218.

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 7 ways as a sum of consecutive naturals, for example, 49547 + ... + 12749066.

Almost surely, 2^{81268120882880} is an apocalyptic number.

81268120882880 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

81268120882880 is an abundant number, since it is smaller than the sum of its proper divisors (112261359633712).

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

81268120882880 is a wasteful number, since it uses less digits than its factorization.

81268120882880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12818473 (or 12818463 counting only the distinct ones).

The product of its (nonzero) digits is 12582912, while the sum is 62.

The spelling of 81268120882880 in words is "eighty-one trillion, two hundred sixty-eight billion, one hundred twenty million, eight hundred eighty-two thousand, eight hundred eighty".