11616331565 has 16 divisors (see below), whose sum is σ = 14172853296. Its totient is φ = 9137664000.

The previous prime is 11616331537. The next prime is 11616331567. The reversal of 11616331565 is 56513361611.

11616331565 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 2153516836 + 9462814729 = 46406^2 + 97277^2 .

It is not a de Polignac number, because 11616331565 - 2¹⁰ = 11616330541 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 (11616331567) 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, 1460339 + ... + 1468271.

It is an arithmetic number, because the mean of its divisors is an integer number (885803331).

Almost surely, 2^11616331565 is an apocalyptic number.

It is an amenable number.

11616331565 is a deficient number, since it is larger than the sum of its proper divisors (2556521731).

11616331565 is an equidigital number, since it uses as much as digits as its factorization.

11616331565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12800.

The product of its digits is 48600, while the sum is 38.

The spelling of 11616331565 in words is "eleven billion, six hundred sixteen million, three hundred thirty-one thousand, five hundred sixty-five".