255005778 has 8 divisors (see below), whose sum is σ = 510011568. Its totient is φ = 85001924.

The previous prime is 255005767. The next prime is 255005791. The reversal of 255005778 is 877500552.

It is a sphenic number, since it is the product of 3 distinct primes.

255005778 is an admirable number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21250476 + ... + 21250487.

It is an arithmetic number, because the mean of its divisors is an integer number (63751446).

Almost surely, 2^255005778 is an apocalyptic number.

255005778 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

255005778 is a wasteful number, since it uses less digits than its factorization.

255005778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42500968.

The product of its (nonzero) digits is 98000, while the sum is 39.

The square root of 255005778 is about 15968.9003378442. The cubic root of 255005778 is about 634.1373600683.

The spelling of 255005778 in words is "two hundred fifty-five million, five thousand, seven hundred seventy-eight".