1688117693388 has 192 divisors, whose sum is σ = 4869433282560. Its totient is φ = 444329908992.

The previous prime is 1688117693279. The next prime is 1688117693389. The reversal of 1688117693388 is 8833967118861.

It is not an unprimeable number, because it can be changed into a prime (1688117693389) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 117329131 + ... + 117343517.

It is an arithmetic number, because the mean of its divisors is an integer number (25361631680).

Almost surely, 2^{1688117693388} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1688117693388, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2434716641280).

1688117693388 is an abundant number, since it is smaller than the sum of its proper divisors (3181315589172).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1688117693388 is a wasteful number, since it uses less digits than its factorization.

1688117693388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16444 (or 16442 counting only the distinct ones).

The product of its digits is 83607552, while the sum is 69.

The spelling of 1688117693388 in words is "one trillion, six hundred eighty-eight billion, one hundred seventeen million, six hundred ninety-three thousand, three hundred eighty-eight".