1685555052 has 48 divisors (see below), whose sum is σ = 4125945600. Its totient is φ = 534829120.

The previous prime is 1685555051. The next prime is 1685555093. The reversal of 1685555052 is 2505555861.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1685554995 and 1685555013.

It is not an unprimeable number, because it can be changed into a prime (1685555051) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 9402 + ... + 58817.

It is an arithmetic number, because the mean of its divisors is an integer number (85957200).

Almost surely, 2^1685555052 is an apocalyptic number.

1685555052 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1685555052 is an abundant number, since it is smaller than the sum of its proper divisors (2440390548).

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

1685555052 is a wasteful number, since it uses less digits than its factorization.

1685555052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68326 (or 68324 counting only the distinct ones).

The product of its (nonzero) digits is 300000, while the sum is 42.

The square root of 1685555052 is about 41055.5118345881. The cubic root of 1685555052 is about 1190.0932186938.

The spelling of 1685555052 in words is "one billion, six hundred eighty-five million, five hundred fifty-five thousand, fifty-two".