688368901872 has 20 divisors (see below), whose sum is σ = 1778286329960. Its totient is φ = 229456300608.

The previous prime is 688368901823. The next prime is 688368901873. The reversal of 688368901872 is 278109863886.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (688368901873) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7170509347 + ... + 7170509442.

It is an arithmetic number, because the mean of its divisors is an integer number (88914316498).

Almost surely, 2^688368901872 is an apocalyptic number.

It is an amenable number.

688368901872 is an abundant number, since it is smaller than the sum of its proper divisors (1089917428088).

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

688368901872 is a wasteful number, since it uses less digits than its factorization.

688368901872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14341018800 (or 14341018794 counting only the distinct ones).

The product of its (nonzero) digits is 55738368, while the sum is 66.

The spelling of 688368901872 in words is "six hundred eighty-eight billion, three hundred sixty-eight million, nine hundred one thousand, eight hundred seventy-two".