688224661320 has 128 divisors (see below), whose sum is σ = 2359970807040. Its totient is φ = 157285601280.

The previous prime is 688224661273. The next prime is 688224661321. The reversal of 688224661320 is 23166422886.

It is a self number, because there is not a number n which added to its sum of digits gives 688224661320.

It is not an unprimeable number, because it can be changed into a prime (688224661321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6093684 + ... + 6205596.

It is an arithmetic number, because the mean of its divisors is an integer number (18437271930).

Almost surely, 2^688224661320 is an apocalyptic number.

688224661320 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

688224661320 is an abundant number, since it is smaller than the sum of its proper divisors (1671746145720).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

688224661320 is a wasteful number, since it uses less digits than its factorization.

688224661320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119255 (or 119251 counting only the distinct ones).

The product of its (nonzero) digits is 1327104, while the sum is 48.

The spelling of 688224661320 in words is "six hundred eighty-eight billion, two hundred twenty-four million, six hundred sixty-one thousand, three hundred twenty".