2105656345427 has 2 divisors, whose sum is σ = 2105656345428. Its totient is φ = 2105656345426.

The previous prime is 2105656345411. The next prime is 2105656345453. The reversal of 2105656345427 is 7245436565012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2105656345427 - 2⁴ = 2105656345411 is a prime.

It is not a weakly prime, because it can be changed into another prime (2105256345427) 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, 1052828172713 + 1052828172714.

It is an arithmetic number, because the mean of its divisors is an integer number (1052828172714).

Almost surely, 2^{2105656345427} is an apocalyptic number.

2105656345427 is a deficient number, since it is larger than the sum of its proper divisors (1).

2105656345427 is an equidigital number, since it uses as much as digits as its factorization.

2105656345427 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6048000, while the sum is 50.

The spelling of 2105656345427 in words is "two trillion, one hundred five billion, six hundred fifty-six million, three hundred forty-five thousand, four hundred twenty-seven".