1687066204243 has 16 divisors (see below), whose sum is σ = 1942435837440. Its totient is φ = 1435291857216.

The previous prime is 1687066204207. The next prime is 1687066204253. The reversal of 1687066204243 is 3424026607861.

It is a de Polignac number, because none of the positive numbers 2^k-1687066204243 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1687066204253) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3682455 + ... + 4115167.

It is an arithmetic number, because the mean of its divisors is an integer number (121402239840).

Almost surely, 2^{1687066204243} is an apocalyptic number.

1687066204243 is a deficient number, since it is larger than the sum of its proper divisors (255369633197).

1687066204243 is a wasteful number, since it uses less digits than its factorization.

1687066204243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 436866.

The product of its (nonzero) digits is 2322432, while the sum is 49.

The spelling of 1687066204243 in words is "one trillion, six hundred eighty-seven billion, sixty-six million, two hundred four thousand, two hundred forty-three".