255604655 has 4 divisors (see below), whose sum is σ = 306725592. Its totient is φ = 204483720.

The previous prime is 255604651. The next prime is 255604667. The reversal of 255604655 is 556406552.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 255604655 - 2² = 255604651 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255604651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25560461 + ... + 25560470.

It is an arithmetic number, because the mean of its divisors is an integer number (76681398).

Almost surely, 2^255604655 is an apocalyptic number.

255604655 is a deficient number, since it is larger than the sum of its proper divisors (51120937).

255604655 is an equidigital number, since it uses as much as digits as its factorization.

255604655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51120936.

The product of its (nonzero) digits is 180000, while the sum is 38.

The square root of 255604655 is about 15987.6406952371. The cubic root of 255604655 is about 634.6333924527.

The spelling of 255604655 in words is "two hundred fifty-five million, six hundred four thousand, six hundred fifty-five".