255145440145 has 4 divisors (see below), whose sum is σ = 306174528180. Its totient is φ = 204116352112.

The previous prime is 255145440127. The next prime is 255145440149. The reversal of 255145440145 is 541044541552.

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 193317623041 + 61827817104 = 439679^2 + 248652^2 .

It is a cyclic number.

It is not a de Polignac number, because 255145440145 - 2²³ = 255137051537 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 255145440098 and 255145440107.

It is not an unprimeable number, because it can be changed into a prime (255145440149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25514544010 + ... + 25514544019.

It is an arithmetic number, because the mean of its divisors is an integer number (76543632045).

Almost surely, 2^255145440145 is an apocalyptic number.

It is an amenable number.

255145440145 is a deficient number, since it is larger than the sum of its proper divisors (51029088035).

255145440145 is an equidigital number, since it uses as much as digits as its factorization.

255145440145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51029088034.

The product of its (nonzero) digits is 320000, while the sum is 40.

Adding to 255145440145 its reverse (541044541552), we get a palindrome (796189981697).

The spelling of 255145440145 in words is "two hundred fifty-five billion, one hundred forty-five million, four hundred forty thousand, one hundred forty-five".