71071065991 has 8 divisors (see below), whose sum is σ = 71271952064. Its totient is φ = 70870464000.

The previous prime is 71071065979. The next prime is 71071066039. The reversal of 71071065991 is 19956017017.

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

It is a cyclic number.

It is not a de Polignac number, because 71071065991 - 2⁹ = 71071065479 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71071065911) 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, 435115 + ... + 575731.

It is an arithmetic number, because the mean of its divisors is an integer number (8908994008).

Almost surely, 2^71071065991 is an apocalyptic number.

71071065991 is a deficient number, since it is larger than the sum of its proper divisors (200886073).

71071065991 is a wasteful number, since it uses less digits than its factorization.

71071065991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142041.

The product of its (nonzero) digits is 119070, while the sum is 46.

The spelling of 71071065991 in words is "seventy-one billion, seventy-one million, sixty-five thousand, nine hundred ninety-one".