800145865 has 4 divisors (see below), whose sum is σ = 960175044. Its totient is φ = 640116688.

The previous prime is 800145839. The next prime is 800145883. The reversal of 800145865 is 568541008.

800145865 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 85599504 + 714546361 = 9252^2 + 26731^2 .

It is a cyclic number.

It is not a de Polignac number, because 800145865 - 2⁷ = 800145737 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 80014582 + ... + 80014591.

It is an arithmetic number, because the mean of its divisors is an integer number (240043761).

Almost surely, 2^800145865 is an apocalyptic number.

It is an amenable number.

800145865 is a deficient number, since it is larger than the sum of its proper divisors (160029179).

800145865 is a wasteful number, since it uses less digits than its factorization.

800145865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160029178.

The product of its (nonzero) digits is 38400, while the sum is 37.

The square root of 800145865 is about 28286.8496832008. The cubic root of 800145865 is about 928.3741837401.

The spelling of 800145865 in words is "eight hundred million, one hundred forty-five thousand, eight hundred sixty-five".