2566131616 has 24 divisors (see below), whose sum is σ = 5175295524. Its totient is φ = 1251770880.

The previous prime is 2566131593. The next prime is 2566131679. The reversal of 2566131616 is 6161316652.

It can be written as a sum of positive squares in 2 ways, for example, as 2479641616 + 86490000 = 49796^2 + 9300^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 976635 + ... + 979258.

Almost surely, 2^2566131616 is an apocalyptic number.

It is an amenable number.

2566131616 is an abundant number, since it is smaller than the sum of its proper divisors (2609163908).

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

2566131616 is a wasteful number, since it uses less digits than its factorization.

2566131616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1955944 (or 1955936 counting only the distinct ones).

The product of its digits is 38880, while the sum is 37.

The square root of 2566131616 is about 50656.9996742800. Note that the first 3 decimals coincide. The cubic root of 2566131616 is about 1369.0720652549.

The spelling of 2566131616 in words is "two billion, five hundred sixty-six million, one hundred thirty-one thousand, six hundred sixteen".