80617720111 has 4 divisors (see below), whose sum is σ = 80618563800. Its totient is φ = 80616876424.

The previous prime is 80617720103. The next prime is 80617720153. The reversal of 80617720111 is 11102771608.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 80617720111 - 2³ = 80617720103 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 (80617720411) 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, 257056 + ... + 476773.

It is an arithmetic number, because the mean of its divisors is an integer number (20154640950).

Almost surely, 2^80617720111 is an apocalyptic number.

80617720111 is a deficient number, since it is larger than the sum of its proper divisors (843689).

80617720111 is a wasteful number, since it uses less digits than its factorization.

80617720111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 843688.

The product of its (nonzero) digits is 4704, while the sum is 34.

The spelling of 80617720111 in words is "eighty billion, six hundred seventeen million, seven hundred twenty thousand, one hundred eleven".