81150281082 has 168 divisors, whose sum is σ = 209259077724. Its totient is φ = 23499320832.

The previous prime is 81150281063. The next prime is 81150281083. The reversal of 81150281082 is 28018205118.

It can be written as a sum of positive squares in 6 ways, for example, as 14287181841 + 66863099241 = 119529^2 + 258579^2 .

It is not an unprimeable number, because it can be changed into a prime (81150281083) by changing a digit.

It is a polite number, since it can be written in 83 ways as a sum of consecutive naturals, for example, 4179148 + ... + 4198520.

Almost surely, 2^81150281082 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 81150281082, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (104629538862).

81150281082 is an abundant number, since it is smaller than the sum of its proper divisors (128108796642).

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

81150281082 is a wasteful number, since it uses less digits than its factorization.

81150281082 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19436 (or 19408 counting only the distinct ones).

The product of its (nonzero) digits is 10240, while the sum is 36.

The spelling of 81150281082 in words is "eighty-one billion, one hundred fifty million, two hundred eighty-one thousand, eighty-two".