27728572841 has 2 divisors, whose sum is σ = 27728572842. Its totient is φ = 27728572840.

The previous prime is 27728572771. The next prime is 27728572867. The reversal of 27728572841 is 14827582772.

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., 27198606400 + 529966441 = 164920^2 + 23021^2 .

It is a cyclic number.

It is not a de Polignac number, because 27728572841 - 2¹⁸ = 27728310697 is a prime.

It is a super-2 number, since 2×27728572841² (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 (27728571841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13864286420 + 13864286421.

It is an arithmetic number, because the mean of its divisors is an integer number (13864286421).

Almost surely, 2^27728572841 is an apocalyptic number.

It is an amenable number.

27728572841 is a deficient number, since it is larger than the sum of its proper divisors (1).

27728572841 is an equidigital number, since it uses as much as digits as its factorization.

27728572841 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3512320, while the sum is 53.

The spelling of 27728572841 in words is "twenty-seven billion, seven hundred twenty-eight million, five hundred seventy-two thousand, eight hundred forty-one".