1685385538674 has 8 divisors (see below), whose sum is σ = 3370771077360. Its totient is φ = 561795179556.

The previous prime is 1685385538649. The next prime is 1685385538699. The reversal of 1685385538674 is 4768355835861.

It is an interprime number because it is at equal distance from previous prime (1685385538649) and next prime (1685385538699).

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

1685385538674 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 1685385538599 and 1685385538608.

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, 140448794884 + ... + 140448794895.

It is an arithmetic number, because the mean of its divisors is an integer number (421346384670).

Almost surely, 2^{1685385538674} is an apocalyptic number.

1685385538674 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1685385538674 is a wasteful number, since it uses less digits than its factorization.

1685385538674 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280897589784.

The product of its digits is 580608000, while the sum is 69.

The spelling of 1685385538674 in words is "one trillion, six hundred eighty-five billion, three hundred eighty-five million, five hundred thirty-eight thousand, six hundred seventy-four".