80705867833 has 4 divisors (see below), whose sum is σ = 80706441460. Its totient is φ = 80705294208.

The previous prime is 80705867771. The next prime is 80705867839. The reversal of 80705867833 is 33876850708.

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 can be written as a sum of positive squares in 2 ways, for example, as 1076364864 + 79629502969 = 32808^2 + 282187^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-80705867833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (80705867839) 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, 84241 + ... + 410497.

It is an arithmetic number, because the mean of its divisors is an integer number (20176610365).

Almost surely, 2^80705867833 is an apocalyptic number.

It is an amenable number.

80705867833 is a deficient number, since it is larger than the sum of its proper divisors (573627).

80705867833 is a wasteful number, since it uses less digits than its factorization.

80705867833 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 573626.

The product of its (nonzero) digits is 6773760, while the sum is 55.

The spelling of 80705867833 in words is "eighty billion, seven hundred five million, eight hundred sixty-seven thousand, eight hundred thirty-three".