1827323665865 has 4 divisors (see below), whose sum is σ = 2192788399044. Its totient is φ = 1461858932688.

The previous prime is 1827323665799. The next prime is 1827323665889. The reversal of 1827323665865 is 5685663237281.

It is a happy number.

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 644650015801 + 1182673650064 = 802901^2 + 1087508^2 .

It is a cyclic number.

It is not a de Polignac number, because 1827323665865 - 2¹² = 1827323661769 is a prime.

It is a super-2 number, since 2×1827323665865² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1827323665798 and 1827323665807.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 182732366582 + ... + 182732366591.

It is an arithmetic number, because the mean of its divisors is an integer number (548197099761).

Almost surely, 2^{1827323665865} is an apocalyptic number.

It is an amenable number.

1827323665865 is a deficient number, since it is larger than the sum of its proper divisors (365464733179).

1827323665865 is an equidigital number, since it uses as much as digits as its factorization.

1827323665865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 365464733178.

The product of its digits is 87091200, while the sum is 62.

The spelling of 1827323665865 in words is "one trillion, eight hundred twenty-seven billion, three hundred twenty-three million, six hundred sixty-five thousand, eight hundred sixty-five".