2516565613 has 4 divisors (see below), whose sum is σ = 2517600700. Its totient is φ = 2515530528.

The previous prime is 2516565587. The next prime is 2516565643. The reversal of 2516565613 is 3165656152.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1869524644 + 647040969 = 43238^2 + 25437^2 .

It is a cyclic number.

It is not a de Polignac number, because 2516565613 - 2⁵ = 2516565581 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2516565643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 513888 + ... + 518761.

It is an arithmetic number, because the mean of its divisors is an integer number (629400175).

Almost surely, 2^2516565613 is an apocalyptic number.

It is an amenable number.

2516565613 is a deficient number, since it is larger than the sum of its proper divisors (1035087).

2516565613 is a wasteful number, since it uses less digits than its factorization.

2516565613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1035086.

The product of its digits is 162000, while the sum is 40.

The square root of 2516565613 is about 50165.3826159036. The cubic root of 2516565613 is about 1360.1999441110.

It can be divided in two parts, 2 and 516565613, that added together give a palindrome (516565615).

The spelling of 2516565613 in words is "two billion, five hundred sixteen million, five hundred sixty-five thousand, six hundred thirteen".