255696985 has 8 divisors (see below), whose sum is σ = 309816000. Its totient is φ = 202571184.

The previous prime is 255696979. The next prime is 255696997. The reversal of 255696985 is 589696552.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 255696985 - 2¹¹ = 255694937 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 247735 + ... + 248764.

It is an arithmetic number, because the mean of its divisors is an integer number (38727000).

Almost surely, 2^255696985 is an apocalyptic number.

It is an amenable number.

255696985 is a deficient number, since it is larger than the sum of its proper divisors (54119015).

255696985 is a wasteful number, since it uses less digits than its factorization.

255696985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 496607.

The product of its digits is 5832000, while the sum is 55.

The square root of 255696985 is about 15990.5279775247. The cubic root of 255696985 is about 634.7097977477.

The spelling of 255696985 in words is "two hundred fifty-five million, six hundred ninety-six thousand, nine hundred eighty-five".