688499797080 has 128 divisors (see below), whose sum is σ = 2079321995520. Its totient is φ = 182375232000.

The previous prime is 688499797021. The next prime is 688499797109. The reversal of 688499797080 is 80797994886.

It is a junction number, because it is equal to n+sod(n) for n = 688499796993 and 688499797011.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11204119 + ... + 11265401.

It is an arithmetic number, because the mean of its divisors is an integer number (16244703090).

Almost surely, 2^688499797080 is an apocalyptic number.

688499797080 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 688499797080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1039660997760).

688499797080 is an abundant number, since it is smaller than the sum of its proper divisors (1390822198440).

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

688499797080 is a wasteful number, since it uses less digits than its factorization.

688499797080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61921 (or 61917 counting only the distinct ones).

The product of its (nonzero) digits is 438939648, while the sum is 75.

The spelling of 688499797080 in words is "six hundred eighty-eight billion, four hundred ninety-nine million, seven hundred ninety-seven thousand, eighty".