81704105068178 has 16 divisors (see below), whose sum is σ = 123746426908416. Its totient is φ = 40455298686720.

The previous prime is 81704105068171. The next prime is 81704105068193. The reversal of 81704105068178 is 87186050140718.

81704105068178 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (81704105068171) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 102371975 + ... + 103166997.

It is an arithmetic number, because the mean of its divisors is an integer number (7734151681776).

Almost surely, 2^{81704105068178} is an apocalyptic number.

81704105068178 is a deficient number, since it is larger than the sum of its proper divisors (42042321840238).

81704105068178 is a wasteful number, since it uses less digits than its factorization.

81704105068178 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1294009.

The product of its (nonzero) digits is 3010560, while the sum is 56.

The spelling of 81704105068178 in words is "eighty-one trillion, seven hundred four billion, one hundred five million, sixty-eight thousand, one hundred seventy-eight".