80775385 has 4 divisors (see below), whose sum is σ = 96930468. Its totient is φ = 64620304.

The previous prime is 80775377. The next prime is 80775389. The reversal of 80775385 is 58357708.

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 29909961 + 50865424 = 5469^2 + 7132^2 .

It is a cyclic number.

It is not a de Polignac number, because 80775385 - 2³ = 80775377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (80775389) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8077534 + ... + 8077543.

It is an arithmetic number, because the mean of its divisors is an integer number (24232617).

Almost surely, 2^80775385 is an apocalyptic number.

It is an amenable number.

80775385 is a deficient number, since it is larger than the sum of its proper divisors (16155083).

80775385 is a wasteful number, since it uses less digits than its factorization.

80775385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16155082.

The product of its (nonzero) digits is 235200, while the sum is 43.

The square root of 80775385 is about 8987.5127259993. The cubic root of 80775385 is about 432.2745614741.

The spelling of 80775385 in words is "eighty million, seven hundred seventy-five thousand, three hundred eighty-five".