27705533987 has 2 divisors, whose sum is σ = 27705533988. Its totient is φ = 27705533986.

The previous prime is 27705533953. The next prime is 27705534023. The reversal of 27705533987 is 78933550772.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 27705533987 - 2⁶ = 27705533923 is a prime.

It is a super-2 number, since 2×27705533987² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (27705530987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13852766993 + 13852766994.

It is an arithmetic number, because the mean of its divisors is an integer number (13852766994).

Almost surely, 2^27705533987 is an apocalyptic number.

27705533987 is a deficient number, since it is larger than the sum of its proper divisors (1).

27705533987 is an equidigital number, since it uses as much as digits as its factorization.

27705533987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11113200, while the sum is 56.

The spelling of 27705533987 in words is "twenty-seven billion, seven hundred five million, five hundred thirty-three thousand, nine hundred eighty-seven".