801275809 has 16 divisors (see below), whose sum is σ = 861304000. Its totient is φ = 743152320.

The previous prime is 801275791. The next prime is 801275821. The reversal of 801275809 is 908572108.

It is not a de Polignac number, because 801275809 - 2⁷ = 801275681 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (801275869) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 263902 + ... + 266920.

It is an arithmetic number, because the mean of its divisors is an integer number (53831500).

Almost surely, 2^801275809 is an apocalyptic number.

It is an amenable number.

801275809 is a deficient number, since it is larger than the sum of its proper divisors (60028191).

801275809 is a wasteful number, since it uses less digits than its factorization.

801275809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3328.

The product of its (nonzero) digits is 40320, while the sum is 40.

The square root of 801275809 is about 28306.8155927155. The cubic root of 801275809 is about 928.8109863602.

The spelling of 801275809 in words is "eight hundred one million, two hundred seventy-five thousand, eight hundred nine".