1684342404245 has 4 divisors (see below), whose sum is σ = 2021210885100. Its totient is φ = 1347473923392.

The previous prime is 1684342404203. The next prime is 1684342404263. The reversal of 1684342404245 is 5424042434861.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 561026466289 + 1123315937956 = 749017^2 + 1059866^2 .

It is a cyclic number.

It is not a de Polignac number, because 1684342404245 - 2¹² = 1684342400149 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1684342404245.

It is a congruent number.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 168434240420 + ... + 168434240429.

It is an arithmetic number, because the mean of its divisors is an integer number (505302721275).

Almost surely, 2^{1684342404245} is an apocalyptic number.

It is an amenable number.

1684342404245 is a deficient number, since it is larger than the sum of its proper divisors (336868480855).

1684342404245 is an equidigital number, since it uses as much as digits as its factorization.

1684342404245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 336868480854.

The product of its (nonzero) digits is 2949120, while the sum is 47.

The spelling of 1684342404245 in words is "one trillion, six hundred eighty-four billion, three hundred forty-two million, four hundred four thousand, two hundred forty-five".