1684854475321 has 2 divisors, whose sum is σ = 1684854475322. Its totient is φ = 1684854475320.

The previous prime is 1684854475301. The next prime is 1684854475357. The reversal of 1684854475321 is 1235744584861.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1021059725625 + 663794749696 = 1010475^2 + 814736^2 .

It is a cyclic number.

It is not a de Polignac number, because 1684854475321 - 2¹⁵ = 1684854442553 is a prime.

It is not a weakly prime, because it can be changed into another prime (1684854475301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 842427237660 + 842427237661.

It is an arithmetic number, because the mean of its divisors is an integer number (842427237661).

Almost surely, 2^{1684854475321} is an apocalyptic number.

It is an amenable number.

1684854475321 is a deficient number, since it is larger than the sum of its proper divisors (1).

1684854475321 is an equidigital number, since it uses as much as digits as its factorization.

1684854475321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25804800, while the sum is 58.

The spelling of 1684854475321 in words is "one trillion, six hundred eighty-four billion, eight hundred fifty-four million, four hundred seventy-five thousand, three hundred twenty-one".