688622566534 has 12 divisors (see below), whose sum is σ = 1201576111164. Its totient is φ = 295123957044.

The previous prime is 688622566517. The next prime is 688622566573. The reversal of 688622566534 is 435665226886.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3513380344 + ... + 3513380539.

It is an arithmetic number, because the mean of its divisors is an integer number (100131342597).

Almost surely, 2^688622566534 is an apocalyptic number.

688622566534 is a deficient number, since it is larger than the sum of its proper divisors (512953544630).

688622566534 is a wasteful number, since it uses less digits than its factorization.

688622566534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7026760899 (or 7026760892 counting only the distinct ones).

The product of its digits is 99532800, while the sum is 61.

The spelling of 688622566534 in words is "six hundred eighty-eight billion, six hundred twenty-two million, five hundred sixty-six thousand, five hundred thirty-four".