255578644 has 6 divisors (see below), whose sum is σ = 447262634. Its totient is φ = 127789320.

The previous prime is 255578641. The next prime is 255578651. The reversal of 255578644 is 446875552.

It can be written as a sum of positive squares in only one way, i.e., 229159044 + 26419600 = 15138^2 + 5140^2 .

It is a junction number, because it is equal to n+sod(n) for n = 255578594 and 255578603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255578641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31947327 + ... + 31947334.

Almost surely, 2^255578644 is an apocalyptic number.

It is an amenable number.

255578644 is a deficient number, since it is larger than the sum of its proper divisors (191683990).

255578644 is a wasteful number, since it uses less digits than its factorization.

255578644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63894665 (or 63894663 counting only the distinct ones).

The product of its digits is 1344000, while the sum is 46.

The square root of 255578644 is about 15986.8272024189. The cubic root of 255578644 is about 634.6118644030.

The spelling of 255578644 in words is "two hundred fifty-five million, five hundred seventy-eight thousand, six hundred forty-four".