1689760817768 has 16 divisors (see below), whose sum is σ = 3169510386660. Its totient is φ = 844558048000.

The previous prime is 1689760817747. The next prime is 1689760817779. The reversal of 1689760817768 is 8677180679861.

It can be written as a sum of positive squares in 2 ways, for example, as 1567609169764 + 122151648004 = 1252042^2 + 349502^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1689760817695 and 1689760817704.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40272833 + ... + 40314768.

Almost surely, 2^{1689760817768} is an apocalyptic number.

It is an amenable number.

1689760817768 is a deficient number, since it is larger than the sum of its proper divisors (1479749568892).

1689760817768 is a wasteful number, since it uses less digits than its factorization.

1689760817768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80590228 (or 80590224 counting only the distinct ones).

The product of its (nonzero) digits is 341397504, while the sum is 74.

The spelling of 1689760817768 in words is "one trillion, six hundred eighty-nine billion, seven hundred sixty million, eight hundred seventeen thousand, seven hundred sixty-eight".