6813505459 has 4 divisors (see below), whose sum is σ = 6818016240. Its totient is φ = 6808994680.

The previous prime is 6813505403. The next prime is 6813505481. The reversal of 6813505459 is 9545053186.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 6813505459 - 2⁹ = 6813504947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6813505499) 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, 2253124 + ... + 2256145.

It is an arithmetic number, because the mean of its divisors is an integer number (1704504060).

Almost surely, 2^6813505459 is an apocalyptic number.

6813505459 is a deficient number, since it is larger than the sum of its proper divisors (4510781).

6813505459 is a wasteful number, since it uses less digits than its factorization.

6813505459 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4510780.

The product of its (nonzero) digits is 648000, while the sum is 46.

The square root of 6813505459 is about 82543.9607663698. The cubic root of 6813505459 is about 1895.7898892835.

The spelling of 6813505459 in words is "six billion, eight hundred thirteen million, five hundred five thousand, four hundred fifty-nine".