1685555013 has 4 divisors (see below), whose sum is σ = 2247406688. Its totient is φ = 1123703340.

The previous prime is 1685555009. The next prime is 1685555051. The reversal of 1685555013 is 3105555861.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1685555013 - 2² = 1685555009 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1685555093) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 280925833 + ... + 280925838.

It is an arithmetic number, because the mean of its divisors is an integer number (561851672).

Almost surely, 2^1685555013 is an apocalyptic number.

It is an amenable number.

1685555013 is a deficient number, since it is larger than the sum of its proper divisors (561851675).

1685555013 is an equidigital number, since it uses as much as digits as its factorization.

1685555013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 561851674.

The product of its (nonzero) digits is 90000, while the sum is 39.

The square root of 1685555013 is about 41055.5113596214. The cubic root of 1685555013 is about 1190.0932095151.

The spelling of 1685555013 in words is "one billion, six hundred eighty-five million, five hundred fifty-five thousand, thirteen".