255515705782 has 64 divisors (see below), whose sum is σ = 415174998528. Its totient is φ = 117697536000.

The previous prime is 255515705749. The next prime is 255515705791. The reversal of 255515705782 is 287507515552.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 27002532 + ... + 27011992.

It is an arithmetic number, because the mean of its divisors is an integer number (6487109352).

Almost surely, 2^255515705782 is an apocalyptic number.

255515705782 is a deficient number, since it is larger than the sum of its proper divisors (159659292746).

255515705782 is a wasteful number, since it uses less digits than its factorization.

255515705782 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9785.

The product of its (nonzero) digits is 4900000, while the sum is 52.

The spelling of 255515705782 in words is "two hundred fifty-five billion, five hundred fifteen million, seven hundred five thousand, seven hundred eighty-two".