255575020778 has 64 divisors (see below), whose sum is σ = 491029088256. Its totient is φ = 96853320000.

The previous prime is 255575020769. The next prime is 255575020817. The reversal of 255575020778 is 877020575552.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 28548203 + ... + 28557153.

It is an arithmetic number, because the mean of its divisors is an integer number (7672329504).

Almost surely, 2^255575020778 is an apocalyptic number.

255575020778 is a deficient number, since it is larger than the sum of its proper divisors (235454067478).

255575020778 is a wasteful number, since it uses less digits than its factorization.

255575020778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14019.

The product of its (nonzero) digits is 6860000, while the sum is 53.

The spelling of 255575020778 in words is "two hundred fifty-five billion, five hundred seventy-five million, twenty thousand, seven hundred seventy-eight".