1685352159866 has 8 divisors (see below), whose sum is σ = 2528275849344. Its totient is φ = 842593543420.

The previous prime is 1685352159859. The next prime is 1685352159893. The reversal of 1685352159866 is 6689512535861.

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

It is a super-2 number, since 2×1685352159866² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41242730 + ... + 41283573.

It is an arithmetic number, because the mean of its divisors is an integer number (316034481168).

Almost surely, 2^{1685352159866} is an apocalyptic number.

1685352159866 is a deficient number, since it is larger than the sum of its proper divisors (842923689478).

1685352159866 is a wasteful number, since it uses less digits than its factorization.

1685352159866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82536516.

The product of its digits is 93312000, while the sum is 65.

The spelling of 1685352159866 in words is "one trillion, six hundred eighty-five billion, three hundred fifty-two million, one hundred fifty-nine thousand, eight hundred sixty-six".