27738280331 has 2 divisors, whose sum is σ = 27738280332. Its totient is φ = 27738280330.

The previous prime is 27738280309. The next prime is 27738280351. The reversal of 27738280331 is 13308283772.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 27738280331 - 2¹⁰ = 27738279307 is a prime.

It is a super-2 number, since 2×27738280331² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (27738280351) by changing a digit.

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 as a sum of consecutive naturals, namely, 13869140165 + 13869140166.

It is an arithmetic number, because the mean of its divisors is an integer number (13869140166).

Almost surely, 2^27738280331 is an apocalyptic number.

27738280331 is a deficient number, since it is larger than the sum of its proper divisors (1).

27738280331 is an equidigital number, since it uses as much as digits as its factorization.

27738280331 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 338688, while the sum is 44.

The spelling of 27738280331 in words is "twenty-seven billion, seven hundred thirty-eight million, two hundred eighty thousand, three hundred thirty-one".