27752330681 has 2 divisors, whose sum is σ = 27752330682. Its totient is φ = 27752330680.

The previous prime is 27752330603. The next prime is 27752330689. The reversal of 27752330681 is 18603325772.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22175975056 + 5576355625 = 148916^2 + 74675^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27752330681 is a prime.

It is a super-2 number, since 2×27752330681² (a number of 22 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (27752330689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13876165340 + 13876165341.

It is an arithmetic number, because the mean of its divisors is an integer number (13876165341).

Almost surely, 2^27752330681 is an apocalyptic number.

It is an amenable number.

27752330681 is a deficient number, since it is larger than the sum of its proper divisors (1).

27752330681 is an equidigital number, since it uses as much as digits as its factorization.

27752330681 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 423360, while the sum is 44.

The spelling of 27752330681 in words is "twenty-seven billion, seven hundred fifty-two million, three hundred thirty thousand, six hundred eighty-one".