81095281038 has 24 divisors (see below), whose sum is σ = 175934959200. Its totient is φ = 26996603904.

The previous prime is 81095280997. The next prime is 81095281039. The reversal of 81095281038 is 83018259018.

It is a happy number.

81095281038 is a `hidden beast` number, since 8 + 10 + 9 + 528 + 103 + 8 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 81095280984 and 81095281002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81095281039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2915478 + ... + 2943161.

It is an arithmetic number, because the mean of its divisors is an integer number (7330623300).

Almost surely, 2^81095281038 is an apocalyptic number.

81095281038 is an abundant number, since it is smaller than the sum of its proper divisors (94839678162).

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

81095281038 is a wasteful number, since it uses less digits than its factorization.

81095281038 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5859416 (or 5859413 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 45.

The spelling of 81095281038 in words is "eighty-one billion, ninety-five million, two hundred eighty-one thousand, thirty-eight".