80571671 has 4 divisors (see below), whose sum is σ = 80721144. Its totient is φ = 80422200.

The previous prime is 80571661. The next prime is 80571709. The reversal of 80571671 is 17617508.

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

It is a cyclic number.

It is not a de Polignac number, because 80571671 - 2¹⁰ = 80570647 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 (80571661) 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, 73925 + ... + 75006.

It is an arithmetic number, because the mean of its divisors is an integer number (20180286).

Almost surely, 2^80571671 is an apocalyptic number.

80571671 is a deficient number, since it is larger than the sum of its proper divisors (149473).

80571671 is a wasteful number, since it uses less digits than its factorization.

80571671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149472.

The product of its (nonzero) digits is 11760, while the sum is 35.

The square root of 80571671 is about 8976.1724025333. The cubic root of 80571671 is about 431.9108594512.

The spelling of 80571671 in words is "eighty million, five hundred seventy-one thousand, six hundred seventy-one".