255128667 has 16 divisors (see below), whose sum is σ = 351682560. Its totient is φ = 164347200.

The previous prime is 255128663. The next prime is 255128669. The reversal of 255128667 is 766821552.

It is not a de Polignac number, because 255128667 - 2² = 255128663 is a prime.

It is not an unprimeable number, because it can be changed into a prime (255128663) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 73542 + ... + 76932.

It is an arithmetic number, because the mean of its divisors is an integer number (21980160).

Almost surely, 2^255128667 is an apocalyptic number.

255128667 is a deficient number, since it is larger than the sum of its proper divisors (96553893).

255128667 is a wasteful number, since it uses less digits than its factorization.

255128667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4234.

The product of its digits is 201600, while the sum is 42.

The square root of 255128667 is about 15972.7476346432. The cubic root of 255128667 is about 634.2392087296.

The spelling of 255128667 in words is "two hundred fifty-five million, one hundred twenty-eight thousand, six hundred sixty-seven".