1686319811 has 32 divisors (see below), whose sum is σ = 2035238400. Its totient is φ = 1379105280.

The previous prime is 1686319801. The next prime is 1686319823. The reversal of 1686319811 is 1189136861.

It is a de Polignac number, because none of the positive numbers 2^k-1686319811 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1686319801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 557060 + ... + 560078.

It is an arithmetic number, because the mean of its divisors is an integer number (63601200).

Almost surely, 2^1686319811 is an apocalyptic number.

1686319811 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1686319811 is a deficient number, since it is larger than the sum of its proper divisors (348918589).

1686319811 is a wasteful number, since it uses less digits than its factorization.

1686319811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3179.

The product of its digits is 62208, while the sum is 44.

The square root of 1686319811 is about 41064.8244973724. The cubic root of 1686319811 is about 1190.2731785803.

The spelling of 1686319811 in words is "one billion, six hundred eighty-six million, three hundred nineteen thousand, eight hundred eleven".