255466254565 has 4 divisors (see below), whose sum is σ = 306559505484. Its totient is φ = 204373003648.

The previous prime is 255466254553. The next prime is 255466254581. The reversal of 255466254565 is 565452664552.

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 105047940321 + 150418314244 = 324111^2 + 387838^2 .

It is a cyclic number.

It is not a de Polignac number, because 255466254565 - 2⁷ = 255466254437 is a prime.

It is a Duffinian number.

It is a congruent number.

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, 25546625452 + ... + 25546625461.

It is an arithmetic number, because the mean of its divisors is an integer number (76639876371).

Almost surely, 2^255466254565 is an apocalyptic number.

It is an amenable number.

255466254565 is a deficient number, since it is larger than the sum of its proper divisors (51093250919).

255466254565 is an equidigital number, since it uses as much as digits as its factorization.

255466254565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51093250918.

The product of its digits is 43200000, while the sum is 55.

The spelling of 255466254565 in words is "two hundred fifty-five billion, four hundred sixty-six million, two hundred fifty-four thousand, five hundred sixty-five".