81080001888000 has 144 divisors (see below), whose sum is σ = 269307226589856. Its totient is φ = 21621333811200.

The previous prime is 81080001887977. The next prime is 81080001888013. The reversal of 81080001888000 is 88810008018.

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, 422195677 + ... + 422387676.

Almost surely, 2^{81080001888000} is an apocalyptic number.

81080001888000 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

81080001888000 is an abundant number, since it is smaller than the sum of its proper divisors (188227224701856).

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

81080001888000 is an equidigital number, since it uses as much as digits as its factorization.

81080001888000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 844583387 (or 844583363 counting only the distinct ones).

The product of its (nonzero) digits is 32768, while the sum is 42.

It can be divided in two parts, 810800018 and 88000, that added together give a palindrome (810888018).

The spelling of 81080001888000 in words is "eighty-one trillion, eighty billion, one million, eight hundred eighty-eight thousand".