27655507729 has 2 divisors, whose sum is σ = 27655507730. Its totient is φ = 27655507728.

The previous prime is 27655507699. The next prime is 27655507777. The reversal of 27655507729 is 92770555672.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24767520129 + 2887987600 = 157377^2 + 53740^2 .

It is a cyclic number.

It is not a de Polignac number, because 27655507729 - 2⁷ = 27655507601 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 27655507729.

It is not a weakly prime, because it can be changed into another prime (27655607729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13827753864 + 13827753865.

It is an arithmetic number, because the mean of its divisors is an integer number (13827753865).

Almost surely, 2^27655507729 is an apocalyptic number.

It is an amenable number.

27655507729 is a deficient number, since it is larger than the sum of its proper divisors (1).

27655507729 is an equidigital number, since it uses as much as digits as its factorization.

27655507729 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9261000, while the sum is 55.

The spelling of 27655507729 in words is "twenty-seven billion, six hundred fifty-five million, five hundred seven thousand, seven hundred twenty-nine".