255755778 has 16 divisors (see below), whose sum is σ = 511932960. Its totient is φ = 85181696.

The previous prime is 255755777. The next prime is 255755779. The reversal of 255755778 is 877557552.

It is an interprime number because it is at equal distance from previous prime (255755777) and next prime (255755779).

It is a super-2 number, since 2×255755778² = 130822035960770568, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 255755778.

It is not an unprimeable number, because it can be changed into a prime (255755771) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 9375 + ... + 24482.

It is an arithmetic number, because the mean of its divisors is an integer number (31995810).

Almost surely, 2^255755778 is an apocalyptic number.

255755778 is an abundant number, since it is smaller than the sum of its proper divisors (256177182).

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

255755778 is a wasteful number, since it uses less digits than its factorization.

255755778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35121.

The product of its digits is 3430000, while the sum is 51.

The square root of 255755778 is about 15992.3662414291. The cubic root of 255755778 is about 634.7584407843.

The spelling of 255755778 in words is "two hundred fifty-five million, seven hundred fifty-five thousand, seven hundred seventy-eight".