81095186355512 has 128 divisors (see below), whose sum is σ = 184436169523200. Its totient is φ = 32632726253568.

The previous prime is 81095186355383. The next prime is 81095186355553. The reversal of 81095186355512 is 21555368159018.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1260795689 + ... + 1260860007.

It is an arithmetic number, because the mean of its divisors is an integer number (1440907574400).

Almost surely, 2^{81095186355512} 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 81095186355512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (92218084761600).

81095186355512 is an abundant number, since it is smaller than the sum of its proper divisors (103340983167688).

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

81095186355512 is a wasteful number, since it uses less digits than its factorization.

81095186355512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67485 (or 67481 counting only the distinct ones).

The product of its (nonzero) digits is 12960000, while the sum is 59.

The spelling of 81095186355512 in words is "eighty-one trillion, ninety-five billion, one hundred eighty-six million, three hundred fifty-five thousand, five hundred twelve".