1684854473891 has 2 divisors, whose sum is σ = 1684854473892. Its totient is φ = 1684854473890.

The previous prime is 1684854473867. The next prime is 1684854473983. The reversal of 1684854473891 is 1983744584861.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1684854473891 - 2¹⁰ = 1684854472867 is a prime.

It is not a weakly prime, because it can be changed into another prime (1684854473821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 842427236945 + 842427236946.

It is an arithmetic number, because the mean of its divisors is an integer number (842427236946).

Almost surely, 2^{1684854473891} is an apocalyptic number.

1684854473891 is a deficient number, since it is larger than the sum of its proper divisors (1).

1684854473891 is an equidigital number, since it uses as much as digits as its factorization.

1684854473891 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 185794560, while the sum is 68.

The spelling of 1684854473891 in words is "one trillion, six hundred eighty-four billion, eight hundred fifty-four million, four hundred seventy-three thousand, eight hundred ninety-one".