27805305528005 has 8 divisors (see below), whose sum is σ = 33410212060824. Its totient is φ = 22215014137600.

The previous prime is 27805305528001. The next prime is 27805305528047. The reversal of 27805305528005 is 50082550350872.

It can be written as a sum of positive squares in 4 ways, for example, as 760999756609 + 27044305771396 = 872353^2 + 5200414^2 .

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

It is not a de Polignac number, because 27805305528005 - 2² = 27805305528001 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 (27805305528001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3653781416 + ... + 3653789025.

It is an arithmetic number, because the mean of its divisors is an integer number (4176276507603).

Almost surely, 2^{27805305528005} is an apocalyptic number.

It is an amenable number.

27805305528005 is a deficient number, since it is larger than the sum of its proper divisors (5604906532819).

27805305528005 is an equidigital number, since it uses as much as digits as its factorization.

27805305528005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7307571207.

The product of its (nonzero) digits is 3360000, while the sum is 50.

Adding to 27805305528005 its reverse (50082550350872), we get a palindrome (77887855878877).

The spelling of 27805305528005 in words is "twenty-seven trillion, eight hundred five billion, three hundred five million, five hundred twenty-eight thousand, five".