27555275049989 has 2 divisors, whose sum is σ = 27555275049990. Its totient is φ = 27555275049988.

The previous prime is 27555275049983. The next prime is 27555275050063. The reversal of 27555275049989 is 98994057255572.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21640796969089 + 5914478080900 = 4651967^2 + 2431970^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27555275049989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27555275049983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13777637524994 + 13777637524995.

It is an arithmetic number, because the mean of its divisors is an integer number (13777637524995).

Almost surely, 2^{27555275049989} is an apocalyptic number.

It is an amenable number.

27555275049989 is a deficient number, since it is larger than the sum of its proper divisors (1).

27555275049989 is an equidigital number, since it uses as much as digits as its factorization.

27555275049989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2857680000, while the sum is 77.

The spelling of 27555275049989 in words is "twenty-seven trillion, five hundred fifty-five billion, two hundred seventy-five million, forty-nine thousand, nine hundred eighty-nine".