81080114544 has 240 divisors, whose sum is σ = 267444069984. Its totient is φ = 22606387200.

The previous prime is 81080114543. The next prime is 81080114593. The reversal of 81080114544 is 44541108018.

81080114544 is a `hidden beast` number, since 8 + 108 + 0 + 1 + 1 + 4 + 544 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 81080114499 and 81080114508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81080114543) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 6521454 + ... + 6533874.

Almost surely, 2^81080114544 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 81080114544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (133722034992).

81080114544 is an abundant number, since it is smaller than the sum of its proper divisors (186363955440).

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

81080114544 is a wasteful number, since it uses less digits than its factorization.

81080114544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12776 (or 12767 counting only the distinct ones).

The product of its (nonzero) digits is 20480, while the sum is 36.

The spelling of 81080114544 in words is "eighty-one billion, eighty million, one hundred fourteen thousand, five hundred forty-four".