1687018666853 has 8 divisors (see below), whose sum is σ = 1817145708000. Its totient is φ = 1556942536368.

The previous prime is 1687018666841. The next prime is 1687018666867. The reversal of 1687018666853 is 3586668107861.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1687018666853 is a prime.

It is a Duffinian number.

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 1687018666853.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1687018666153) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12658823 + ... + 12791396.

It is an arithmetic number, because the mean of its divisors is an integer number (227143213500).

Almost surely, 2^{1687018666853} is an apocalyptic number.

1687018666853 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1687018666853 is a deficient number, since it is larger than the sum of its proper divisors (130127041147).

1687018666853 is a wasteful number, since it uses less digits than its factorization.

1687018666853 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25455331.

The product of its (nonzero) digits is 69672960, while the sum is 65.

The spelling of 1687018666853 in words is "one trillion, six hundred eighty-seven billion, eighteen million, six hundred sixty-six thousand, eight hundred fifty-three".