809711064 has 24 divisors (see below), whose sum is σ = 2192967660. Its totient is φ = 269903664.

The previous prime is 809711057. The next prime is 809711081. The reversal of 809711064 is 460117908.

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5622922 + ... + 5623065.

Almost surely, 2^809711064 is an apocalyptic number.

It is an amenable number.

809711064 is an abundant number, since it is smaller than the sum of its proper divisors (1383256596).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

809711064 is a wasteful number, since it uses less digits than its factorization.

809711064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11245999 (or 11245992 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 36.

The square root of 809711064 is about 28455.4224006603. The cubic root of 809711064 is about 932.0589001685.

The spelling of 809711064 in words is "eight hundred nine million, seven hundred eleven thousand, sixty-four".