255863695680 has 84 divisors (see below), whose sum is σ = 880064513172. Its totient is φ = 68230318080.

The previous prime is 255863695673. The next prime is 255863695697. The reversal of 255863695680 is 86596368552.

255863695680 is a `hidden beast` number, since 2 + 5 + 5 + 8 + 6 + 3 + 69 + 568 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 107133145344 + 148730550336 = 327312^2 + 385656^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 44417901 + ... + 44423660.

Almost surely, 2^255863695680 is an apocalyptic number.

255863695680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

255863695680 is an abundant number, since it is smaller than the sum of its proper divisors (624200817492).

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

255863695680 is a wasteful number, since it uses less digits than its factorization.

255863695680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88841584 (or 88841571 counting only the distinct ones).

The product of its (nonzero) digits is 93312000, while the sum is 63.

The spelling of 255863695680 in words is "two hundred fifty-five billion, eight hundred sixty-three million, six hundred ninety-five thousand, six hundred eighty".