255805078 has 4 divisors (see below), whose sum is σ = 383707620. Its totient is φ = 127902538.

The previous prime is 255805063. The next prime is 255805079. The reversal of 255805078 is 870508552.

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

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 255805078.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255805079) 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 as a sum of consecutive naturals, namely, 63951268 + ... + 63951271.

It is an arithmetic number, because the mean of its divisors is an integer number (95926905).

Almost surely, 2^255805078 is an apocalyptic number.

255805078 is a deficient number, since it is larger than the sum of its proper divisors (127902542).

255805078 is a wasteful number, since it uses less digits than its factorization.

255805078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127902541.

The product of its (nonzero) digits is 112000, while the sum is 40.

The square root of 255805078 is about 15993.9075275556. The cubic root of 255805078 is about 634.7992239367.

The spelling of 255805078 in words is "two hundred fifty-five million, eight hundred five thousand, seventy-eight".