865083383513 has 4 divisors (see below), whose sum is σ = 874803421620. Its totient is φ = 855363345408.

The previous prime is 865083383491. The next prime is 865083383597. The reversal of 865083383513 is 315383380568.

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 120181475584 + 744901907929 = 346672^2 + 863077^2 .

It is a cyclic number.

It is not a de Polignac number, because 865083383513 - 2¹² = 865083379417 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (865083983513) 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, 4860018920 + ... + 4860019097.

It is an arithmetic number, because the mean of its divisors is an integer number (218700855405).

Almost surely, 2^865083383513 is an apocalyptic number.

It is an amenable number.

865083383513 is a deficient number, since it is larger than the sum of its proper divisors (9720038107).

865083383513 is an equidigital number, since it uses as much as digits as its factorization.

865083383513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9720038106.

The product of its (nonzero) digits is 6220800, while the sum is 53.

The spelling of 865083383513 in words is "eight hundred sixty-five billion, eighty-three million, three hundred eighty-three thousand, five hundred thirteen".