27755277749513 has 2 divisors, whose sum is σ = 27755277749514. Its totient is φ = 27755277749512.

The previous prime is 27755277749417. The next prime is 27755277749543. The reversal of 27755277749513 is 31594777255772.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27698884798729 + 56392950784 = 5262973^2 + 237472^2 .

It is a cyclic number.

It is not a de Polignac number, because 27755277749513 - 2⁸ = 27755277749257 is a prime.

It is a super-2 number, since 2×27755277749513² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (27755277749543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13877638874756 + 13877638874757.

It is an arithmetic number, because the mean of its divisors is an integer number (13877638874757).

Almost surely, 2^{27755277749513} is an apocalyptic number.

It is an amenable number.

27755277749513 is a deficient number, since it is larger than the sum of its proper divisors (1).

27755277749513 is an equidigital number, since it uses as much as digits as its factorization.

27755277749513 is an evil number, because the sum of its binary digits is even.

The product of its digits is 907578000, while the sum is 71.

The spelling of 27755277749513 in words is "twenty-seven trillion, seven hundred fifty-five billion, two hundred seventy-seven million, seven hundred forty-nine thousand, five hundred thirteen".