81704733807471 has 8 divisors (see below), whose sum is σ = 108971066966784. Its totient is φ = 54454111593240.

The previous prime is 81704733807397. The next prime is 81704733807491. The reversal of 81704733807471 is 17470833740718.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 81704733807471 - 2¹¹ = 81704733805423 is a prime.

It is a super-3 number, since 3×81704733807471³ (a number of 43 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81704733807491) 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, 3927724135 + ... + 3927744936.

It is an arithmetic number, because the mean of its divisors is an integer number (13621383370848).

Almost surely, 2^{81704733807471} is an apocalyptic number.

81704733807471 is a deficient number, since it is larger than the sum of its proper divisors (27266333159313).

81704733807471 is a wasteful number, since it uses less digits than its factorization.

81704733807471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7855472541.

The product of its (nonzero) digits is 22127616, while the sum is 60.

The spelling of 81704733807471 in words is "eighty-one trillion, seven hundred four billion, seven hundred thirty-three million, eight hundred seven thousand, four hundred seventy-one".