27741705281 has 2 divisors, whose sum is σ = 27741705282. Its totient is φ = 27741705280.

The previous prime is 27741705239. The next prime is 27741705311. The reversal of 27741705281 is 18250714772.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26762015281 + 979690000 = 163591^2 + 31300^2 .

It is a cyclic number.

It is not a de Polignac number, because 27741705281 - 2³⁴ = 10561836097 is a prime.

It is a super-2 number, since 2×27741705281² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (27741705181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13870852640 + 13870852641.

It is an arithmetic number, because the mean of its divisors is an integer number (13870852641).

Almost surely, 2^27741705281 is an apocalyptic number.

It is an amenable number.

27741705281 is a deficient number, since it is larger than the sum of its proper divisors (1).

27741705281 is an equidigital number, since it uses as much as digits as its factorization.

27741705281 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 219520, while the sum is 44.

The spelling of 27741705281 in words is "twenty-seven billion, seven hundred forty-one million, seven hundred five thousand, two hundred eighty-one".