1686261067811 has 2 divisors, whose sum is σ = 1686261067812. Its totient is φ = 1686261067810.

The previous prime is 1686261067801. The next prime is 1686261067877. The reversal of 1686261067811 is 1187601626861.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1686261067811 is a prime.

It is not a weakly prime, because it can be changed into another prime (1686261067801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 843130533905 + 843130533906.

It is an arithmetic number, because the mean of its divisors is an integer number (843130533906).

Almost surely, 2^{1686261067811} is an apocalyptic number.

1686261067811 is a deficient number, since it is larger than the sum of its proper divisors (1).

1686261067811 is an equidigital number, since it uses as much as digits as its factorization.

1686261067811 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1161216, while the sum is 53.

The spelling of 1686261067811 in words is "one trillion, six hundred eighty-six billion, two hundred sixty-one million, sixty-seven thousand, eight hundred eleven".