27128143993 has 2 divisors, whose sum is σ = 27128143994. Its totient is φ = 27128143992.

The previous prime is 27128143961. The next prime is 27128144027. The reversal of 27128143993 is 39934182172.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27123784249 + 4359744 = 164693^2 + 2088^2 .

It is a cyclic number.

It is not a de Polignac number, because 27128143993 - 2⁵ = 27128143961 is a prime.

It is not a weakly prime, because it can be changed into another prime (27128143093) 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, 13564071996 + 13564071997.

It is an arithmetic number, because the mean of its divisors is an integer number (13564071997).

Almost surely, 2^27128143993 is an apocalyptic number.

It is an amenable number.

27128143993 is a deficient number, since it is larger than the sum of its proper divisors (1).

27128143993 is an equidigital number, since it uses as much as digits as its factorization.

27128143993 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 653184, while the sum is 49.

The spelling of 27128143993 in words is "twenty-seven billion, one hundred twenty-eight million, one hundred forty-three thousand, nine hundred ninety-three".