27613256387 has 2 divisors, whose sum is σ = 27613256388. Its totient is φ = 27613256386.

The previous prime is 27613256381. The next prime is 27613256431. The reversal of 27613256387 is 78365231672.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 27613256387 - 2⁸ = 27613256131 is a prime.

It is not a weakly prime, because it can be changed into another prime (27613256381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13806628193 + 13806628194.

It is an arithmetic number, because the mean of its divisors is an integer number (13806628194).

Almost surely, 2^27613256387 is an apocalyptic number.

27613256387 is a deficient number, since it is larger than the sum of its proper divisors (1).

27613256387 is an equidigital number, since it uses as much as digits as its factorization.

27613256387 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2540160, while the sum is 50.

The spelling of 27613256387 in words is "twenty-seven billion, six hundred thirteen million, two hundred fifty-six thousand, three hundred eighty-seven".