1684279648771 has 2 divisors, whose sum is σ = 1684279648772. Its totient is φ = 1684279648770.

The previous prime is 1684279648747. The next prime is 1684279648817. The reversal of 1684279648771 is 1778469724861.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1684279648771 - 2¹⁹ = 1684279124483 is a prime.

It is a super-3 number, since 3×1684279648771³ (a number of 38 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1684279648771.

It is not a weakly prime, because it can be changed into another prime (1684279648171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 842139824385 + 842139824386.

It is an arithmetic number, because the mean of its divisors is an integer number (842139824386).

Almost surely, 2^{1684279648771} is an apocalyptic number.

1684279648771 is a deficient number, since it is larger than the sum of its proper divisors (1).

1684279648771 is an equidigital number, since it uses as much as digits as its factorization.

1684279648771 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 227598336, while the sum is 70.

The spelling of 1684279648771 in words is "one trillion, six hundred eighty-four billion, two hundred seventy-nine million, six hundred forty-eight thousand, seven hundred seventy-one".