17785412656668 has 24 divisors (see below), whose sum is σ = 46110329110160. Its totient is φ = 5928470885520.

The previous prime is 17785412656663. The next prime is 17785412656709. The reversal of 17785412656668 is 86665621458771.

It is a junction number, because it is equal to n+sod(n) for n = 17785412656596 and 17785412656605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (17785412656663) 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, 82339873303 + ... + 82339873518.

Almost surely, 2^{17785412656668} is an apocalyptic number.

17785412656668 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

17785412656668 is an abundant number, since it is smaller than the sum of its proper divisors (28324916453492).

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

17785412656668 is a wasteful number, since it uses less digits than its factorization.

17785412656668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164679746834 (or 164679746826 counting only the distinct ones).

The product of its digits is 812851200, while the sum is 72.

The spelling of 17785412656668 in words is "seventeen trillion, seven hundred eighty-five billion, four hundred twelve million, six hundred fifty-six thousand, six hundred sixty-eight".