2105643774287 has 2 divisors, whose sum is σ = 2105643774288. Its totient is φ = 2105643774286.

The previous prime is 2105643774277. The next prime is 2105643774341. The reversal of 2105643774287 is 7824773465012.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2105643774287 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2105643774277) 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, 1052821887143 + 1052821887144.

It is an arithmetic number, because the mean of its divisors is an integer number (1052821887144).

Almost surely, 2^{2105643774287} is an apocalyptic number.

2105643774287 is a deficient number, since it is larger than the sum of its proper divisors (1).

2105643774287 is an equidigital number, since it uses as much as digits as its factorization.

2105643774287 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15805440, while the sum is 56.

The spelling of 2105643774287 in words is "two trillion, one hundred five billion, six hundred forty-three million, seven hundred seventy-four thousand, two hundred eighty-seven".