1689391339794 has 64 divisors (see below), whose sum is σ = 3956935017600. Its totient is φ = 533453409216.

The previous prime is 1689391339789. The next prime is 1689391339843. The reversal of 1689391339794 is 4979331939861.

1689391339794 is a `hidden beast` number, since 1 + 68 + 9 + 3 + 91 + 3 + 397 + 94 = 666.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10094304 + ... + 10260299.

It is an arithmetic number, because the mean of its divisors is an integer number (61827109650).

Almost surely, 2^{1689391339794} is an apocalyptic number.

1689391339794 is an abundant number, since it is smaller than the sum of its proper divisors (2267543677806).

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

1689391339794 is a wasteful number, since it uses less digits than its factorization.

1689391339794 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20354696 (or 20354690 counting only the distinct ones).

The product of its digits is 238085568, while the sum is 72.

The spelling of 1689391339794 in words is "one trillion, six hundred eighty-nine billion, three hundred ninety-one million, three hundred thirty-nine thousand, seven hundred ninety-four".