255784068709 has 8 divisors (see below), whose sum is σ = 276249054200. Its totient is φ = 235431838656.

The previous prime is 255784068691. The next prime is 255784068739. The reversal of 255784068709 is 907860487552.

It can be written as a sum of positive squares in 4 ways, for example, as 70001518084 + 185782550625 = 264578^2 + 431025^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 255784068709 - 2¹¹ = 255784066661 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 (255784068739) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28184142 + ... + 28193215.

It is an arithmetic number, because the mean of its divisors is an integer number (34531131775).

Almost surely, 2^255784068709 is an apocalyptic number.

It is an amenable number.

255784068709 is a deficient number, since it is larger than the sum of its proper divisors (20464985491).

255784068709 is a wasteful number, since it uses less digits than its factorization.

255784068709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56377719.

The product of its (nonzero) digits is 33868800, while the sum is 61.

The spelling of 255784068709 in words is "two hundred fifty-five billion, seven hundred eighty-four million, sixty-eight thousand, seven hundred nine".