1680436811 has 2 divisors, whose sum is σ = 1680436812. Its totient is φ = 1680436810.

The previous prime is 1680436799. The next prime is 1680436831. The reversal of 1680436811 is 1186340861.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1680436811 - 2³⁰ = 606694987 is a prime.

It is not a weakly prime, because it can be changed into another prime (1680436831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 840218405 + 840218406.

It is an arithmetic number, because the mean of its divisors is an integer number (840218406).

Almost surely, 2^1680436811 is an apocalyptic number.

1680436811 is a deficient number, since it is larger than the sum of its proper divisors (1).

1680436811 is an equidigital number, since it uses as much as digits as its factorization.

1680436811 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27648, while the sum is 38.

The square root of 1680436811 is about 40993.1312661036. The cubic root of 1680436811 is about 1188.8874121995.

The spelling of 1680436811 in words is "one billion, six hundred eighty million, four hundred thirty-six thousand, eight hundred eleven".