2813815856 has 20 divisors (see below), whose sum is σ = 5452744752. Its totient is φ = 1406655936.

The previous prime is 2813815853. The next prime is 2813815889. The reversal of 2813815856 is 6585183182.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 2813815856.

It is not an unprimeable number, because it can be changed into a prime (2813815853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 103925 + ... + 128171.

Almost surely, 2^2813815856 is an apocalyptic number.

It is an amenable number.

2813815856 is a deficient number, since it is larger than the sum of its proper divisors (2638928896).

2813815856 is a wasteful number, since it uses less digits than its factorization.

2813815856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31508 (or 31502 counting only the distinct ones).

The product of its digits is 460800, while the sum is 47.

The square root of 2813815856 is about 53045.4131476040. The cubic root of 2813815856 is about 1411.7741455159.

The spelling of 2813815856 in words is "two billion, eight hundred thirteen million, eight hundred fifteen thousand, eight hundred fifty-six".