27776072729 has 2 divisors, whose sum is σ = 27776072730. Its totient is φ = 27776072728.

The previous prime is 27776072699. The next prime is 27776072801. The reversal of 27776072729 is 92727067772.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25138736704 + 2637336025 = 158552^2 + 51355^2 .

It is a cyclic number.

It is not a de Polignac number, because 27776072729 - 2¹² = 27776068633 is a prime.

It is not a weakly prime, because it can be changed into another prime (27776072629) 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, 13888036364 + 13888036365.

It is an arithmetic number, because the mean of its divisors is an integer number (13888036365).

Almost surely, 2^27776072729 is an apocalyptic number.

It is an amenable number.

27776072729 is a deficient number, since it is larger than the sum of its proper divisors (1).

27776072729 is an equidigital number, since it uses as much as digits as its factorization.

27776072729 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7260624, while the sum is 56.

The spelling of 27776072729 in words is "twenty-seven billion, seven hundred seventy-six million, seventy-two thousand, seven hundred twenty-nine".