688907329636436 has 24 divisors (see below), whose sum is σ = 1207989942526080. Its totient is φ = 343767352092192.

The previous prime is 688907329636373. The next prime is 688907329636483. The reversal of 688907329636436 is 634636923709886.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 559600385 + ... + 560830103.

It is an arithmetic number, because the mean of its divisors is an integer number (50332914271920).

Almost surely, 2^{688907329636436} is an apocalyptic number.

It is an amenable number.

688907329636436 is a deficient number, since it is larger than the sum of its proper divisors (519082612889644).

688907329636436 is a wasteful number, since it uses less digits than its factorization.

688907329636436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1508663 (or 1508661 counting only the distinct ones).

The product of its (nonzero) digits is 10158317568, while the sum is 80.

The spelling of 688907329636436 in words is "six hundred eighty-eight trillion, nine hundred seven billion, three hundred twenty-nine million, six hundred thirty-six thousand, four hundred thirty-six".