81014806173 has 16 divisors (see below), whose sum is σ = 129948561920. Its totient is φ = 43857639216.

The previous prime is 81014806151. The next prime is 81014806183. The reversal of 81014806173 is 37160841018.

It is not a de Polignac number, because 81014806173 - 2¹⁰ = 81014805149 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81014806123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 101521915 + ... + 101522712.

It is an arithmetic number, because the mean of its divisors is an integer number (8121785120).

Almost surely, 2^81014806173 is an apocalyptic number.

It is an amenable number.

81014806173 is a deficient number, since it is larger than the sum of its proper divisors (48933755747).

81014806173 is a wasteful number, since it uses less digits than its factorization.

81014806173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203044656.

The product of its (nonzero) digits is 32256, while the sum is 39.

The spelling of 81014806173 in words is "eighty-one billion, fourteen million, eight hundred six thousand, one hundred seventy-three".