255603655 has 4 divisors (see below), whose sum is σ = 306724392. Its totient is φ = 204482920.

The previous prime is 255603643. The next prime is 255603661. The reversal of 255603655 is 556306552.

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

It is not a de Polignac number, because 255603655 - 2¹³ = 255595463 is a prime.

It is a Duffinian number.

It is a zygodrome in base 2.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25560361 + ... + 25560370.

It is an arithmetic number, because the mean of its divisors is an integer number (76681098).

Almost surely, 2^255603655 is an apocalyptic number.

255603655 is a deficient number, since it is larger than the sum of its proper divisors (51120737).

255603655 is an equidigital number, since it uses as much as digits as its factorization.

255603655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51120736.

The product of its (nonzero) digits is 135000, while the sum is 37.

The square root of 255603655 is about 15987.6094210485. The cubic root of 255603655 is about 634.6325648279.

The spelling of 255603655 in words is "two hundred fifty-five million, six hundred three thousand, six hundred fifty-five".