1685331265 has 4 divisors (see below), whose sum is σ = 2022397524. Its totient is φ = 1348265008.

The previous prime is 1685331239. The next prime is 1685331269. The reversal of 1685331265 is 5621335861.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1132187904 + 553143361 = 33648^2 + 23519^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1685331265 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1685331269) 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 3 ways as a sum of consecutive naturals, for example, 168533122 + ... + 168533131.

It is an arithmetic number, because the mean of its divisors is an integer number (505599381).

Almost surely, 2^1685331265 is an apocalyptic number.

It is an amenable number.

1685331265 is a deficient number, since it is larger than the sum of its proper divisors (337066259).

1685331265 is an equidigital number, since it uses as much as digits as its factorization.

1685331265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 337066258.

The product of its digits is 129600, while the sum is 40.

The square root of 1685331265 is about 41052.7863244384. The cubic root of 1685331265 is about 1190.0405477792.

The spelling of 1685331265 in words is "one billion, six hundred eighty-five million, three hundred thirty-one thousand, two hundred sixty-five".