2616321565 has 96 divisors (see below), whose sum is σ = 4038652800. Its totient is φ = 1599575040.

The previous prime is 2616321563. The next prime is 2616321569. The reversal of 2616321565 is 5651236162.

It is not a de Polignac number, because 2616321565 - 2¹ = 2616321563 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2616321563) 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 95 ways as a sum of consecutive naturals, for example, 11424871 + ... + 11425099.

It is an arithmetic number, because the mean of its divisors is an integer number (42069300).

Almost surely, 2^2616321565 is an apocalyptic number.

It is an amenable number.

2616321565 is a deficient number, since it is larger than the sum of its proper divisors (1422331235).

2616321565 is a wasteful number, since it uses less digits than its factorization.

2616321565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 335 (or 306 counting only the distinct ones).

The product of its digits is 64800, while the sum is 37.

The square root of 2616321565 is about 51149.9908602142. The cubic root of 2616321565 is about 1377.9402101834.

The spelling of 2616321565 in words is "two billion, six hundred sixteen million, three hundred twenty-one thousand, five hundred sixty-five".