255645312361 has 8 divisors (see below), whose sum is σ = 264198095784. Its totient is φ = 247202887680.

The previous prime is 255645312353. The next prime is 255645312467. The reversal of 255645312361 is 163213546552.

It can be written as a sum of positive squares in 4 ways, for example, as 4575169600 + 251070142761 = 67640^2 + 501069^2 .

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 255645312361 - 2³ = 255645312353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (255645312161) 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, 27584976 + ... + 27594241.

It is an arithmetic number, because the mean of its divisors is an integer number (33024761973).

Almost surely, 2^255645312361 is an apocalyptic number.

It is an amenable number.

255645312361 is a deficient number, since it is larger than the sum of its proper divisors (8552783423).

255645312361 is a wasteful number, since it uses less digits than its factorization.

255645312361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55179371.

The product of its digits is 648000, while the sum is 43.

The spelling of 255645312361 in words is "two hundred fifty-five billion, six hundred forty-five million, three hundred twelve thousand, three hundred sixty-one".