27485620777 has 2 divisors, whose sum is σ = 27485620778. Its totient is φ = 27485620776.

The previous prime is 27485620763. The next prime is 27485620853. The reversal of 27485620777 is 77702658472.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18917526681 + 8568094096 = 137541^2 + 92564^2 .

It is a cyclic number.

It is not a de Polignac number, because 27485620777 - 2¹¹ = 27485618729 is a prime.

It is not a weakly prime, because it can be changed into another prime (27485620717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13742810388 + 13742810389.

It is an arithmetic number, because the mean of its divisors is an integer number (13742810389).

Almost surely, 2^27485620777 is an apocalyptic number.

It is an amenable number.

27485620777 is a deficient number, since it is larger than the sum of its proper divisors (1).

27485620777 is an equidigital number, since it uses as much as digits as its factorization.

27485620777 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9219840, while the sum is 55.

The spelling of 27485620777 in words is "twenty-seven billion, four hundred eighty-five million, six hundred twenty thousand, seven hundred seventy-seven".