255566205361 has 4 divisors (see below), whose sum is σ = 255961207872. Its totient is φ = 255171202852.

The previous prime is 255566205299. The next prime is 255566205373. The reversal of 255566205361 is 163502665552.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 255566205361 - 2⁹ = 255566204849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (255566205761) 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, 197500285 + ... + 197501578.

It is an arithmetic number, because the mean of its divisors is an integer number (63990301968).

Almost surely, 2^255566205361 is an apocalyptic number.

It is an amenable number.

255566205361 is a deficient number, since it is larger than the sum of its proper divisors (395002511).

255566205361 is an equidigital number, since it uses as much as digits as its factorization.

255566205361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 395002510.

The product of its (nonzero) digits is 1620000, while the sum is 46.

The spelling of 255566205361 in words is "two hundred fifty-five billion, five hundred sixty-six million, two hundred five thousand, three hundred sixty-one".