1688668703853 has 8 divisors (see below), whose sum is σ = 2256572880000. Its totient is φ = 1123271831808.

The previous prime is 1688668703803. The next prime is 1688668703879. The reversal of 1688668703853 is 3583078668861.

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

It is not a de Polignac number, because 1688668703853 - 2⁹ = 1688668703341 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1688668703803) 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, 626824453 + ... + 626827146.

It is an arithmetic number, because the mean of its divisors is an integer number (282071610000).

Almost surely, 2^{1688668703853} is an apocalyptic number.

It is an amenable number.

1688668703853 is a deficient number, since it is larger than the sum of its proper divisors (567904176147).

1688668703853 is a wasteful number, since it uses less digits than its factorization.

1688668703853 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1253652051.

The product of its (nonzero) digits is 278691840, while the sum is 69.

The spelling of 1688668703853 in words is "one trillion, six hundred eighty-eight billion, six hundred sixty-eight million, seven hundred three thousand, eight hundred fifty-three".