800820809465 has 32 divisors (see below), whose sum is σ = 1022352541056. Its totient is φ = 601382960640.

The previous prime is 800820809387. The next prime is 800820809489. The reversal of 800820809465 is 564908028008.

It is not a de Polignac number, because 800820809465 - 2¹⁴ = 800820793081 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 87362 + ... + 1268571.

It is an arithmetic number, because the mean of its divisors is an integer number (31948516908).

Almost surely, 2^800820809465 is an apocalyptic number.

It is an amenable number.

800820809465 is a deficient number, since it is larger than the sum of its proper divisors (221531731591).

800820809465 is a wasteful number, since it uses less digits than its factorization.

800820809465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1356089.

The product of its (nonzero) digits is 1105920, while the sum is 50.

The spelling of 800820809465 in words is "eight hundred billion, eight hundred twenty million, eight hundred nine thousand, four hundred sixty-five".