2105643774277 has 2 divisors, whose sum is σ = 2105643774278. Its totient is φ = 2105643774276.

The previous prime is 2105643774251. The next prime is 2105643774287. The reversal of 2105643774277 is 7724773465012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1979328216996 + 126315557281 = 1406886^2 + 355409^2 .

It is a cyclic number.

It is not a de Polignac number, because 2105643774277 - 2³¹ = 2103496290629 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2105643774287) 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, 1052821887138 + 1052821887139.

It is an arithmetic number, because the mean of its divisors is an integer number (1052821887139).

Almost surely, 2^{2105643774277} is an apocalyptic number.

It is an amenable number.

2105643774277 is a deficient number, since it is larger than the sum of its proper divisors (1).

2105643774277 is an equidigital number, since it uses as much as digits as its factorization.

2105643774277 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13829760, while the sum is 55.

The spelling of 2105643774277 in words is "two trillion, one hundred five billion, six hundred forty-three million, seven hundred seventy-four thousand, two hundred seventy-seven".