81039108106 has 16 divisors (see below), whose sum is σ = 132634959840. Its totient is φ = 36828872080.

The previous prime is 81039108097. The next prime is 81039108113. The reversal of 81039108106 is 60180193018.

It is an unprimeable number.

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, 236476 + ... + 466903.

It is an arithmetic number, because the mean of its divisors is an integer number (8289684990).

Almost surely, 2^81039108106 is an apocalyptic number.

81039108106 is a deficient number, since it is larger than the sum of its proper divisors (51595851734).

81039108106 is a wasteful number, since it uses less digits than its factorization.

81039108106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 708629.

The product of its (nonzero) digits is 10368, while the sum is 37.

The spelling of 81039108106 in words is "eighty-one billion, thirty-nine million, one hundred eight thousand, one hundred six".