27750450005 has 4 divisors (see below), whose sum is σ = 33300540012. Its totient is φ = 22200360000.

The previous prime is 27750449977. The next prime is 27750450037. The reversal of 27750450005 is 50005405772.

It is a happy number.

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 8761334404 + 18989115601 = 93602^2 + 137801^2 .

It is not a de Polignac number, because 27750450005 - 2²² = 27746255701 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 2775044996 + ... + 2775045005.

It is an arithmetic number, because the mean of its divisors is an integer number (8325135003).

Almost surely, 2^27750450005 is an apocalyptic number.

It is an amenable number.

27750450005 is a deficient number, since it is larger than the sum of its proper divisors (5550090007).

27750450005 is an equidigital number, since it uses as much as digits as its factorization.

27750450005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5550090006.

The product of its (nonzero) digits is 49000, while the sum is 35.

Adding to 27750450005 its reverse (50005405772), we get a palindrome (77755855777).

The spelling of 27750450005 in words is "twenty-seven billion, seven hundred fifty million, four hundred fifty thousand, five".