805030078361 has 4 divisors (see below), whose sum is σ = 805050462900. Its totient is φ = 805009693824.

The previous prime is 805030078327. The next prime is 805030078379. The reversal of 805030078361 is 163870030508.

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 460320183961 + 344709894400 = 678469^2 + 587120^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-805030078361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (805030074361) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10132916 + ... + 10212053.

It is an arithmetic number, because the mean of its divisors is an integer number (201262615725).

Almost surely, 2^805030078361 is an apocalyptic number.

It is an amenable number.

805030078361 is a deficient number, since it is larger than the sum of its proper divisors (20384539).

805030078361 is a wasteful number, since it uses less digits than its factorization.

805030078361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20384538.

The product of its (nonzero) digits is 120960, while the sum is 41.

The spelling of 805030078361 in words is "eight hundred five billion, thirty million, seventy-eight thousand, three hundred sixty-one".