81039741112 has 32 divisors (see below), whose sum is σ = 165986340480. Its totient is φ = 36786638560.

The previous prime is 81039741061. The next prime is 81039741113. The reversal of 81039741112 is 21114793018.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81039741113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 554338 + ... + 685105.

It is an arithmetic number, because the mean of its divisors is an integer number (5187073140).

Almost surely, 2^81039741112 is an apocalyptic number.

It is an amenable number.

81039741112 is an abundant number, since it is smaller than the sum of its proper divisors (84946599368).

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

81039741112 is a wasteful number, since it uses less digits than its factorization.

81039741112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1240203 (or 1240199 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 37.

The spelling of 81039741112 in words is "eighty-one billion, thirty-nine million, seven hundred forty-one thousand, one hundred twelve".