255912644 has 18 divisors (see below), whose sum is σ = 484948170. Its totient is φ = 118113216.

The previous prime is 255912641. The next prime is 255912661. The reversal of 255912644 is 446219552.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 11303044 + 244609600 = 3362^2 + 15640^2 .

It is a junction number, because it is equal to n+sod(n) for n = 255912598 and 255912607.

It is not an unprimeable number, because it can be changed into a prime (255912641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 188609 + ... + 189960.

It is an arithmetic number, because the mean of its divisors is an integer number (26941565).

Almost surely, 2^255912644 is an apocalyptic number.

It is an amenable number.

255912644 is a deficient number, since it is larger than the sum of its proper divisors (229035526).

255912644 is a wasteful number, since it uses less digits than its factorization.

255912644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 378599 (or 378584 counting only the distinct ones).

The product of its digits is 86400, while the sum is 38.

The square root of 255912644 is about 15997.2698920785. The cubic root of 255912644 is about 634.8881891299. Note that the first 3 decimals are identical.

The spelling of 255912644 in words is "two hundred fifty-five million, nine hundred twelve thousand, six hundred forty-four".