6816579151 has 4 divisors (see below), whose sum is σ = 6817836952. Its totient is φ = 6815321352.

The previous prime is 6816579149. The next prime is 6816579169. The reversal of 6816579151 is 1519756186.

It is a happy number.

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 6816579151 - 2¹ = 6816579149 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6816579095 and 6816579104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6816577151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 620736 + ... + 631621.

It is an arithmetic number, because the mean of its divisors is an integer number (1704459238).

Almost surely, 2^6816579151 is an apocalyptic number.

6816579151 is a deficient number, since it is larger than the sum of its proper divisors (1257801).

6816579151 is a wasteful number, since it uses less digits than its factorization.

6816579151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1257800.

The product of its digits is 453600, while the sum is 49.

The square root of 6816579151 is about 82562.5771824015. The cubic root of 6816579151 is about 1896.0749211338.

The spelling of 6816579151 in words is "six billion, eight hundred sixteen million, five hundred seventy-nine thousand, one hundred fifty-one".