27505258250521 has 2 divisors, whose sum is σ = 27505258250522. Its totient is φ = 27505258250520.

The previous prime is 27505258250447. The next prime is 27505258250647. The reversal of 27505258250521 is 12505285250572.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25947664393225 + 1557593857296 = 5093885^2 + 1248036^2 .

It is a cyclic number.

It is not a de Polignac number, because 27505258250521 - 2⁹ = 27505258250009 is a prime.

It is not a weakly prime, because it can be changed into another prime (27505258260521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13752629125260 + 13752629125261.

It is an arithmetic number, because the mean of its divisors is an integer number (13752629125261).

Almost surely, 2^{27505258250521} is an apocalyptic number.

It is an amenable number.

27505258250521 is a deficient number, since it is larger than the sum of its proper divisors (1).

27505258250521 is an equidigital number, since it uses as much as digits as its factorization.

27505258250521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2800000, while the sum is 49.

The spelling of 27505258250521 in words is "twenty-seven trillion, five hundred five billion, two hundred fifty-eight million, two hundred fifty thousand, five hundred twenty-one".