5615516565 has 20 divisors (see below), whose sum is σ = 10066334124. Its totient is φ = 2994941952.

The previous prime is 5615516561. The next prime is 5615516611. The reversal of 5615516565 is 5656155165.

It can be written as a sum of positive squares in 2 ways, for example, as 3673087236 + 1942429329 = 60606^2 + 44073^2 .

It is not a de Polignac number, because 5615516565 - 2² = 5615516561 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 5615516565.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5615516561) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 6932332 + ... + 6933141.

Almost surely, 2^5615516565 is an apocalyptic number.

It is an amenable number.

5615516565 is a deficient number, since it is larger than the sum of its proper divisors (4450817559).

5615516565 is a wasteful number, since it uses less digits than its factorization.

5615516565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13865490 (or 13865481 counting only the distinct ones).

The product of its digits is 675000, while the sum is 45.

The square root of 5615516565 is about 74936.7504299459. The cubic root of 5615516565 is about 1777.4466362231.

The spelling of 5615516565 in words is "five billion, six hundred fifteen million, five hundred sixteen thousand, five hundred sixty-five".