27412664565505 has 8 divisors (see below), whose sum is σ = 32895254917224. Its totient is φ = 21930093360000.

The previous prime is 27412664565443. The next prime is 27412664565509. The reversal of 27412664565505 is 50556546621472.

It can be written as a sum of positive squares in 4 ways, for example, as 7959660336369 + 19453004229136 = 2821287^2 + 4410556^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 27412664565505 - 2²⁹ = 27412127694593 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 27412664565505.

It is not an unprimeable number, because it can be changed into a prime (27412664565509) 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 7 ways as a sum of consecutive naturals, for example, 1421646 + ... + 7539655.

It is an arithmetic number, because the mean of its divisors is an integer number (4111906864653).

Almost surely, 2^{27412664565505} is an apocalyptic number.

It is an amenable number.

27412664565505 is a deficient number, since it is larger than the sum of its proper divisors (5482590351719).

27412664565505 is an equidigital number, since it uses as much as digits as its factorization.

27412664565505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9573107.

The product of its (nonzero) digits is 60480000, while the sum is 58.

The spelling of 27412664565505 in words is "twenty-seven trillion, four hundred twelve billion, six hundred sixty-four million, five hundred sixty-five thousand, five hundred five".