80785530005 has 4 divisors (see below), whose sum is σ = 96942636012. Its totient is φ = 64628424000.

The previous prime is 80785529969. The next prime is 80785530013. The reversal of 80785530005 is 50003558708.

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

It can be written as a sum of positive squares in 2 ways, for example, as 14671750129 + 66113779876 = 121127^2 + 257126^2 .

It is not a de Polignac number, because 80785530005 - 2⁸ = 80785529749 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8078552996 + ... + 8078553005.

It is an arithmetic number, because the mean of its divisors is an integer number (24235659003).

Almost surely, 2^80785530005 is an apocalyptic number.

It is an amenable number.

80785530005 is a deficient number, since it is larger than the sum of its proper divisors (16157106007).

80785530005 is a wasteful number, since it uses less digits than its factorization.

80785530005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16157106006.

The product of its (nonzero) digits is 168000, while the sum is 41.

The spelling of 80785530005 in words is "eighty billion, seven hundred eighty-five million, five hundred thirty thousand, five".