255055002778 has 4 divisors (see below), whose sum is σ = 382582504170. Its totient is φ = 127527501388.

The previous prime is 255055002767. The next prime is 255055002817. The reversal of 255055002778 is 877200550552.

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

It can be written as a sum of positive squares in only one way, i.e., 230925419209 + 24129583569 = 480547^2 + 155337^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63763750693 + ... + 63763750696.

Almost surely, 2^255055002778 is an apocalyptic number.

255055002778 is a deficient number, since it is larger than the sum of its proper divisors (127527501392).

255055002778 is a wasteful number, since it uses less digits than its factorization.

255055002778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127527501391.

The product of its (nonzero) digits is 980000, while the sum is 46.

The spelling of 255055002778 in words is "two hundred fifty-five billion, fifty-five million, two thousand, seven hundred seventy-eight".