71083465681 has 4 divisors (see below), whose sum is σ = 73534619700. Its totient is φ = 68632311664.

The previous prime is 71083465657. The next prime is 71083465697. The reversal of 71083465681 is 18656438017.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 53657089600 + 17426376081 = 231640^2 + 132009^2 .

It is a cyclic number.

It is not a de Polignac number, because 71083465681 - 2²⁵ = 71049911249 is a prime.

It is a super-2 number, since 2×71083465681² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71083465181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1225576966 + ... + 1225577023.

It is an arithmetic number, because the mean of its divisors is an integer number (18383654925).

Almost surely, 2^71083465681 is an apocalyptic number.

It is an amenable number.

71083465681 is a deficient number, since it is larger than the sum of its proper divisors (2451154019).

71083465681 is a wasteful number, since it uses less digits than its factorization.

71083465681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2451154018.

The product of its (nonzero) digits is 967680, while the sum is 49.

The spelling of 71083465681 in words is "seventy-one billion, eighty-three million, four hundred sixty-five thousand, six hundred eighty-one".