1688808969617 has 8 divisors (see below), whose sum is σ = 2105528066112. Its totient is φ = 1315955041200.

The previous prime is 1688808969583. The next prime is 1688808969623. The reversal of 1688808969617 is 7169698088861.

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

It is a cyclic number.

It is not a de Polignac number, because 1688808969617 - 2¹⁰ = 1688808968593 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (77), and also a Moran number because the ratio is a prime number: 21932584021 = 1688808969617 / (1 + 6 + 8 + 8 + 8 + 0 + 8 + 9 + 6 + 9 + 6 + 1 + 7).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1688808969677) 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, 10966291934 + ... + 10966292087.

It is an arithmetic number, because the mean of its divisors is an integer number (263191008264).

Almost surely, 2^{1688808969617} is an apocalyptic number.

It is an amenable number.

1688808969617 is a deficient number, since it is larger than the sum of its proper divisors (416719096495).

1688808969617 is a wasteful number, since it uses less digits than its factorization.

1688808969617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21932584039.

The product of its (nonzero) digits is 501645312, while the sum is 77.

The spelling of 1688808969617 in words is "one trillion, six hundred eighty-eight billion, eight hundred eight million, nine hundred sixty-nine thousand, six hundred seventeen".