688656189263 has 16 divisors (see below), whose sum is σ = 814206703680. Its totient is φ = 569900034816.

The previous prime is 688656189257. The next prime is 688656189289. The reversal of 688656189263 is 362981656886.

688656189263 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 688656189263 - 2²⁰ = 688655140687 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 688656189193 and 688656189202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (688656189563) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6945545 + ... + 7043997.

It is an arithmetic number, because the mean of its divisors is an integer number (50887918980).

Almost surely, 2^688656189263 is an apocalyptic number.

688656189263 is a deficient number, since it is larger than the sum of its proper divisors (125550514417).

688656189263 is a wasteful number, since it uses less digits than its factorization.

688656189263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132946.

The product of its digits is 179159040, while the sum is 68.

The spelling of 688656189263 in words is "six hundred eighty-eight billion, six hundred fifty-six million, one hundred eighty-nine thousand, two hundred sixty-three".