71581073071071 has 4 divisors (see below), whose sum is σ = 95441430761432. Its totient is φ = 47720715380712.

The previous prime is 71581073071003. The next prime is 71581073071073. The reversal of 71581073071071 is 17017037018517.

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

It is not a de Polignac number, because 71581073071071 - 2⁷ = 71581073070943 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 71581073071071.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71581073071073) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11930178845176 + ... + 11930178845181.

It is an arithmetic number, because the mean of its divisors is an integer number (23860357690358).

Almost surely, 2^{71581073071071} is an apocalyptic number.

71581073071071 is a deficient number, since it is larger than the sum of its proper divisors (23860357690361).

71581073071071 is a wasteful number, since it uses less digits than its factorization.

71581073071071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23860357690360.

The product of its (nonzero) digits is 288120, while the sum is 48.

The spelling of 71581073071071 in words is "seventy-one trillion, five hundred eighty-one billion, seventy-three million, seventy-one thousand, seventy-one".