2778550760897 has 2 divisors, whose sum is σ = 2778550760898. Its totient is φ = 2778550760896.

The previous prime is 2778550760819. The next prime is 2778550760899. The reversal of 2778550760897 is 7980670558772.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2190447360256 + 588103400641 = 1480016^2 + 766879^2 .

It is a cyclic number.

It is not a de Polignac number, because 2778550760897 - 2¹⁸ = 2778550498753 is a prime.

Together with 2778550760899, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2778550760897.

It is not a weakly prime, because it can be changed into another prime (2778550760899) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1389275380448 + 1389275380449.

It is an arithmetic number, because the mean of its divisors is an integer number (1389275380449).

Almost surely, 2^{2778550760897} is an apocalyptic number.

It is an amenable number.

2778550760897 is a deficient number, since it is larger than the sum of its proper divisors (1).

2778550760897 is an equidigital number, since it uses as much as digits as its factorization.

2778550760897 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 414892800, while the sum is 71.

The spelling of 2778550760897 in words is "two trillion, seven hundred seventy-eight billion, five hundred fifty million, seven hundred sixty thousand, eight hundred ninety-seven".