2816561963 has 16 divisors (see below), whose sum is σ = 2931831936. Its totient is φ = 2703966720.

The previous prime is 2816561959. The next prime is 2816561999. The reversal of 2816561963 is 3691656182.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 2816561963 - 2² = 2816561959 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2816561933) 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 15 ways as a sum of consecutive naturals, for example, 600395 + ... + 605067.

It is an arithmetic number, because the mean of its divisors is an integer number (183239496).

Almost surely, 2^2816561963 is an apocalyptic number.

2816561963 is a deficient number, since it is larger than the sum of its proper divisors (115269973).

2816561963 is a wasteful number, since it uses less digits than its factorization.

2816561963 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4954.

The product of its digits is 466560, while the sum is 47.

The square root of 2816561963 is about 53071.2913259137. The cubic root of 2816561963 is about 1412.2332637320.

The spelling of 2816561963 in words is "two billion, eight hundred sixteen million, five hundred sixty-one thousand, nine hundred sixty-three".