1686214365799 has 4 divisors (see below), whose sum is σ = 1687679366400. Its totient is φ = 1684749365200.

The previous prime is 1686214365767. The next prime is 1686214365827. The reversal of 1686214365799 is 9975634126861.

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

It is a cyclic number.

It is not a de Polignac number, because 1686214365799 - 2⁵ = 1686214365767 is a prime.

It is a super-3 number, since 3×1686214365799³ (a number of 38 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (67) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1686214345799) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 732498574 + ... + 732500875.

It is an arithmetic number, because the mean of its divisors is an integer number (421919841600).

Almost surely, 2^{1686214365799} is an apocalyptic number.

1686214365799 is a deficient number, since it is larger than the sum of its proper divisors (1465000601).

1686214365799 is a wasteful number, since it uses less digits than its factorization.

1686214365799 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1465000600.

The product of its digits is 117573120, while the sum is 67.

The spelling of 1686214365799 in words is "one trillion, six hundred eighty-six billion, two hundred fourteen million, three hundred sixty-five thousand, seven hundred ninety-nine".