1685412594 has 48 divisors (see below), whose sum is σ = 3858017280. Its totient is φ = 530284320.

The previous prime is 1685412577. The next prime is 1685412601. The reversal of 1685412594 is 4952145861.

1685412594 is a `hidden beast` number, since 1 + 6 + 8 + 54 + 1 + 2 + 594 = 666.

It is a super-2 number, since 2×1685412594² = 5681231224027617672, which contains 22 as substring.

It is a Curzon number.

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 23 ways as a sum of consecutive naturals, for example, 85839 + ... + 103629.

It is an arithmetic number, because the mean of its divisors is an integer number (80375360).

Almost surely, 2^1685412594 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1685412594, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1929008640).

1685412594 is an abundant number, since it is smaller than the sum of its proper divisors (2172604686).

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

1685412594 is a wasteful number, since it uses less digits than its factorization.

1685412594 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18095 (or 18092 counting only the distinct ones).

The product of its digits is 345600, while the sum is 45.

The square root of 1685412594 is about 41053.7768542676. The cubic root of 1685412594 is about 1190.0596900596.

The spelling of 1685412594 in words is "one billion, six hundred eighty-five million, four hundred twelve thousand, five hundred ninety-four".