2775728605049 has 2 divisors, whose sum is σ = 2775728605050. Its totient is φ = 2775728605048.

The previous prime is 2775728604991. The next prime is 2775728605079. The reversal of 2775728605049 is 9405068275772.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2534804699449 + 240923905600 = 1592107^2 + 490840^2 .

It is a cyclic number.

It is not a de Polignac number, because 2775728605049 - 2¹⁶ = 2775728539513 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2775728604982 and 2775728605000.

It is not a weakly prime, because it can be changed into another prime (2775728605079) 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, 1387864302524 + 1387864302525.

It is an arithmetic number, because the mean of its divisors is an integer number (1387864302525).

Almost surely, 2^{2775728605049} is an apocalyptic number.

It is an amenable number.

2775728605049 is a deficient number, since it is larger than the sum of its proper divisors (1).

2775728605049 is an equidigital number, since it uses as much as digits as its factorization.

2775728605049 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 59270400, while the sum is 62.

The spelling of 2775728605049 in words is "two trillion, seven hundred seventy-five billion, seven hundred twenty-eight million, six hundred five thousand, forty-nine".