27611051681 has 2 divisors, whose sum is σ = 27611051682. Its totient is φ = 27611051680.

The previous prime is 27611051623. The next prime is 27611051719. The reversal of 27611051681 is 18615011672.

It is an a-pointer prime, because the next prime (27611051719) can be obtained adding 27611051681 to its sum of digits (38).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25789469281 + 1821582400 = 160591^2 + 42680^2 .

It is a cyclic number.

It is not a de Polignac number, because 27611051681 - 2¹⁴ = 27611035297 is a prime.

It is a super-2 number, since 2×27611051681² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (27611851681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13805525840 + 13805525841.

It is an arithmetic number, because the mean of its divisors is an integer number (13805525841).

Almost surely, 2^27611051681 is an apocalyptic number.

It is an amenable number.

27611051681 is a deficient number, since it is larger than the sum of its proper divisors (1).

27611051681 is an equidigital number, since it uses as much as digits as its factorization.

27611051681 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20160, while the sum is 38.

The spelling of 27611051681 in words is "twenty-seven billion, six hundred eleven million, fifty-one thousand, six hundred eighty-one".