688563801 has 16 divisors (see below), whose sum is σ = 1080100800. Its totient is φ = 432039744.

The previous prime is 688563797. The next prime is 688563809. The reversal of 688563801 is 108365886.

688563801 is a `hidden beast` number, since 6 + 8 + 8 + 5 + 638 + 0 + 1 = 666.

It is not a de Polignac number, because 688563801 - 2² = 688563797 is a prime.

It is not an unprimeable number, because it can be changed into a prime (688563809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 749611 + ... + 750528.

It is an arithmetic number, because the mean of its divisors is an integer number (67506300).

Almost surely, 2^688563801 is an apocalyptic number.

It is an amenable number.

688563801 is a deficient number, since it is larger than the sum of its proper divisors (391536999).

688563801 is a wasteful number, since it uses less digits than its factorization.

688563801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1500165 (or 1500159 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 45.

The square root of 688563801 is about 26240.4992521103. The cubic root of 688563801 is about 883.0420720360.

The spelling of 688563801 in words is "six hundred eighty-eight million, five hundred sixty-three thousand, eight hundred one".