688169520272 has 80 divisors (see below), whose sum is σ = 1522562049792. Its totient is φ = 298499696640.

The previous prime is 688169520209. The next prime is 688169520281. The reversal of 688169520272 is 272025961886.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2302553 + ... + 2584199.

Almost surely, 2^688169520272 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 688169520272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (761281024896).

688169520272 is an abundant number, since it is smaller than the sum of its proper divisors (834392529520).

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

688169520272 is a wasteful number, since it uses less digits than its factorization.

688169520272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 282376 (or 282370 counting only the distinct ones).

The product of its (nonzero) digits is 5806080, while the sum is 56.

The spelling of 688169520272 in words is "six hundred eighty-eight billion, one hundred sixty-nine million, five hundred twenty thousand, two hundred seventy-two".