1685916864 has 42 divisors (see below), whose sum is σ = 4832377940. Its totient is φ = 561972096.

The previous prime is 1685916863. The next prime is 1685916889. The reversal of 1685916864 is 4686195861.

It is a zygodrome in base 3.

It is a self number, because there is not a number n which added to its sum of digits gives 1685916864.

It is not an unprimeable number, because it can be changed into a prime (1685916863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1462894 + ... + 1464045.

Almost surely, 2^1685916864 is an apocalyptic number.

It is an amenable number.

1685916864 is an abundant number, since it is smaller than the sum of its proper divisors (3146461076).

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

1685916864 is a wasteful number, since it uses less digits than its factorization.

1685916864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2926957 (or 2926944 counting only the distinct ones).

The product of its digits is 2488320, while the sum is 54.

The square root of 1685916864 is about 41059.9179736151. The cubic root of 1685916864 is about 1190.1783655621.

The spelling of 1685916864 in words is "one billion, six hundred eighty-five million, nine hundred sixteen thousand, eight hundred sixty-four".