80811844067 has 4 divisors (see below), whose sum is σ = 82782864696. Its totient is φ = 78840823440.

The previous prime is 80811844063. The next prime is 80811844081. The reversal of 80811844067 is 76044811808.

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 80811844067 - 2² = 80811844063 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (80811844063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 985510253 + ... + 985510334.

It is an arithmetic number, because the mean of its divisors is an integer number (20695716174).

Almost surely, 2^80811844067 is an apocalyptic number.

80811844067 is a deficient number, since it is larger than the sum of its proper divisors (1971020629).

80811844067 is a wasteful number, since it uses less digits than its factorization.

80811844067 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1971020628.

The product of its (nonzero) digits is 344064, while the sum is 47.

The spelling of 80811844067 in words is "eighty billion, eight hundred eleven million, eight hundred forty-four thousand, sixty-seven".