1685005211828 has 12 divisors (see below), whose sum is σ = 2955326516100. Its totient is φ = 840626207232.

The previous prime is 1685005211753. The next prime is 1685005211843. The reversal of 1685005211828 is 8281125005861.

It can be written as a sum of positive squares in 2 ways, for example, as 1383606407824 + 301398804004 = 1176268^2 + 548998^2 .

It is a super-2 number, since 2×1685005211828² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

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, 469097651 + ... + 469101242.

It is an arithmetic number, because the mean of its divisors is an integer number (246277209675).

Almost surely, 2^{1685005211828} is an apocalyptic number.

It is an amenable number.

1685005211828 is a deficient number, since it is larger than the sum of its proper divisors (1270321304272).

1685005211828 is a wasteful number, since it uses less digits than its factorization.

1685005211828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 938199346 (or 938199344 counting only the distinct ones).

The product of its (nonzero) digits is 307200, while the sum is 47.

The spelling of 1685005211828 in words is "one trillion, six hundred eighty-five billion, five million, two hundred eleven thousand, eight hundred twenty-eight".