12783265065 has 12 divisors (see below), whose sum is σ = 22157659524. Its totient is φ = 6817741344.

The previous prime is 12783265043. The next prime is 12783265109. The reversal of 12783265065 is 56056238721.

12783265065 is a `hidden beast` number, since 1 + 278 + 326 + 50 + 6 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1398161664 + 11385103401 = 37392^2 + 106701^2 .

It is not a de Polignac number, because 12783265065 - 2¹⁰ = 12783264041 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 284072557 = 12783265065 / (1 + 2 + 7 + 8 + 3 + 2 + 6 + 5 + 0 + 6 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 12783265065.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 142036234 + ... + 142036323.

It is an arithmetic number, because the mean of its divisors is an integer number (1846471627).

Almost surely, 2^12783265065 is an apocalyptic number.

12783265065 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12783265065 is a deficient number, since it is larger than the sum of its proper divisors (9374394459).

12783265065 is a wasteful number, since it uses less digits than its factorization.

12783265065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284072568 (or 284072565 counting only the distinct ones).

The product of its (nonzero) digits is 604800, while the sum is 45.

The spelling of 12783265065 in words is "twelve billion, seven hundred eighty-three million, two hundred sixty-five thousand, sixty-five".