27640127639 has 2 divisors, whose sum is σ = 27640127640. Its totient is φ = 27640127638.

The previous prime is 27640127579. The next prime is 27640127693. The reversal of 27640127639 is 93672104672.

Together with next prime (27640127693) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 27640127639 - 2²⁰ = 27639079063 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 27640127593 and 27640127602.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27640127699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13820063819 + 13820063820.

It is an arithmetic number, because the mean of its divisors is an integer number (13820063820).

Almost surely, 2^27640127639 is an apocalyptic number.

27640127639 is a deficient number, since it is larger than the sum of its proper divisors (1).

27640127639 is an equidigital number, since it uses as much as digits as its factorization.

27640127639 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 762048, while the sum is 47.

The spelling of 27640127639 in words is "twenty-seven billion, six hundred forty million, one hundred twenty-seven thousand, six hundred thirty-nine".