255505582505 has 4 divisors (see below), whose sum is σ = 306606699012. Its totient is φ = 204404466000.

The previous prime is 255505582489. The next prime is 255505582511. The reversal of 255505582505 is 505285505552.

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 194893112089 + 60612470416 = 441467^2 + 246196^2 .

It is not a de Polignac number, because 255505582505 - 2⁴ = 255505582489 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 255505582505.

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, 25550558246 + ... + 25550558255.

It is an arithmetic number, because the mean of its divisors is an integer number (76651674753).

Almost surely, 2^255505582505 is an apocalyptic number.

It is an amenable number.

255505582505 is a deficient number, since it is larger than the sum of its proper divisors (51101116507).

255505582505 is an equidigital number, since it uses as much as digits as its factorization.

255505582505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51101116506.

The product of its (nonzero) digits is 2500000, while the sum is 47.

The spelling of 255505582505 in words is "two hundred fifty-five billion, five hundred five million, five hundred eighty-two thousand, five hundred five".