2778008275061 has 2 divisors, whose sum is σ = 2778008275062. Its totient is φ = 2778008275060.

The previous prime is 2778008274961. The next prime is 2778008275111. The reversal of 2778008275061 is 1605728008772.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2166474891025 + 611533384036 = 1471895^2 + 782006^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2778008275061 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2778008274994 and 2778008275012.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2778008277061) 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, 1389004137530 + 1389004137531.

It is an arithmetic number, because the mean of its divisors is an integer number (1389004137531).

Almost surely, 2^{2778008275061} is an apocalyptic number.

It is an amenable number.

2778008275061 is a deficient number, since it is larger than the sum of its proper divisors (1).

2778008275061 is an equidigital number, since it uses as much as digits as its factorization.

2778008275061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2634240, while the sum is 53.

The spelling of 2778008275061 in words is "two trillion, seven hundred seventy-eight billion, eight million, two hundred seventy-five thousand, sixty-one".