2768561567489 has 2 divisors, whose sum is σ = 2768561567490. Its totient is φ = 2768561567488.

The previous prime is 2768561567479. The next prime is 2768561567521. The reversal of 2768561567489 is 9847651658672.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2146860857089 + 621700710400 = 1465217^2 + 788480^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2768561567489 is a prime.

It is not a weakly prime, because it can be changed into another prime (2768561567459) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1384280783744 + 1384280783745.

It is an arithmetic number, because the mean of its divisors is an integer number (1384280783745).

Almost surely, 2^{2768561567489} is an apocalyptic number.

It is an amenable number.

2768561567489 is a deficient number, since it is larger than the sum of its proper divisors (1).

2768561567489 is an equidigital number, since it uses as much as digits as its factorization.

2768561567489 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1219276800, while the sum is 74.

The spelling of 2768561567489 in words is "two trillion, seven hundred sixty-eight billion, five hundred sixty-one million, five hundred sixty-seven thousand, four hundred eighty-nine".