688626255 has 32 divisors (see below), whose sum is σ = 1122785280. Its totient is φ = 360305280.

The previous prime is 688626251. The next prime is 688626269. The reversal of 688626255 is 552626886.

688626255 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 688626255 - 2² = 688626251 is a prime.

It is a super-2 number, since 2×688626255² = 948412238150650050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (688626251) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 477826 + ... + 479264.

It is an arithmetic number, because the mean of its divisors is an integer number (35087040).

Almost surely, 2^688626255 is an apocalyptic number.

688626255 is a deficient number, since it is larger than the sum of its proper divisors (434159025).

688626255 is a wasteful number, since it uses less digits than its factorization.

688626255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2031.

The product of its digits is 1382400, while the sum is 48.

The square root of 688626255 is about 26241.6892558387. The cubic root of 688626255 is about 883.0687690742.

The spelling of 688626255 in words is "six hundred eighty-eight million, six hundred twenty-six thousand, two hundred fifty-five".