27755280749 has 6 divisors (see below), whose sum is σ = 32286755214. Its totient is φ = 23790240600.

The previous prime is 27755280739. The next prime is 27755280757. The reversal of 27755280749 is 94708255772.

It can be written as a sum of positive squares in only one way, i.e., 27000405124 + 754875625 = 164318^2 + 27475^2 .

It is not a de Polignac number, because 27755280749 - 2⁸ = 27755280493 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 27755280694 and 27755280703.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27755280739) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 283217102 + ... + 283217199.

It is an arithmetic number, because the mean of its divisors is an integer number (5381125869).

Almost surely, 2^27755280749 is an apocalyptic number.

It is an amenable number.

27755280749 is a deficient number, since it is larger than the sum of its proper divisors (4531474465).

27755280749 is an equidigital number, since it uses as much as digits as its factorization.

27755280749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 566434315 (or 566434308 counting only the distinct ones).

The product of its (nonzero) digits is 9878400, while the sum is 56.

The spelling of 27755280749 in words is "twenty-seven billion, seven hundred fifty-five million, two hundred eighty thousand, seven hundred forty-nine".