27689046181 has 2 divisors, whose sum is σ = 27689046182. Its totient is φ = 27689046180.

The previous prime is 27689046139. The next prime is 27689046247. The reversal of 27689046181 is 18164098672.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23767155556 + 3921890625 = 154166^2 + 62625^2 .

It is a cyclic number.

It is not a de Polignac number, because 27689046181 - 2⁹ = 27689045669 is a prime.

It is a super-2 number, since 2×27689046181² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27689046101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13844523090 + 13844523091.

It is an arithmetic number, because the mean of its divisors is an integer number (13844523091).

Almost surely, 2^27689046181 is an apocalyptic number.

It is an amenable number.

27689046181 is a deficient number, since it is larger than the sum of its proper divisors (1).

27689046181 is an equidigital number, since it uses as much as digits as its factorization.

27689046181 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1161216, while the sum is 52.

The spelling of 27689046181 in words is "twenty-seven billion, six hundred eighty-nine million, forty-six thousand, one hundred eighty-one".