80811771 has 4 divisors (see below), whose sum is σ = 107749032. Its totient is φ = 53874512.

The previous prime is 80811743. The next prime is 80811793. The reversal of 80811771 is 17711808.

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 80811771 - 2¹⁴ = 80795387 is a prime.

It is not an unprimeable number, because it can be changed into a prime (80811701) 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, 13468626 + ... + 13468631.

It is an arithmetic number, because the mean of its divisors is an integer number (26937258).

Almost surely, 2^80811771 is an apocalyptic number.

80811771 is a deficient number, since it is larger than the sum of its proper divisors (26937261).

80811771 is a wasteful number, since it uses less digits than its factorization.

80811771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26937260.

The product of its (nonzero) digits is 3136, while the sum is 33.

The square root of 80811771 is about 8989.5367511346. The cubic root of 80811771 is about 432.3394590543.

The spelling of 80811771 in words is "eighty million, eight hundred eleven thousand, seven hundred seventy-one".