689403385680 has 160 divisors (see below), whose sum is σ = 2251055923200. Its totient is φ = 174054836736.

The previous prime is 689403385679. The next prime is 689403385691. The reversal of 689403385680 is 86583304986.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (60).

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, 7280881 + ... + 7374959.

It is an arithmetic number, because the mean of its divisors is an integer number (14069099520).

Almost surely, 2^689403385680 is an apocalyptic number.

689403385680 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 689403385680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1125527961600).

689403385680 is an abundant number, since it is smaller than the sum of its proper divisors (1561652537520).

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

689403385680 is a wasteful number, since it uses less digits than its factorization.

689403385680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95721 (or 95715 counting only the distinct ones).

The product of its (nonzero) digits is 29859840, while the sum is 60.

The spelling of 689403385680 in words is "six hundred eighty-nine billion, four hundred three million, three hundred eighty-five thousand, six hundred eighty".