689756289660 has 144 divisors (see below), whose sum is σ = 2100267423072. Its totient is φ = 183232051200.

The previous prime is 689756289653. The next prime is 689756289661. The reversal of 689756289660 is 66982657986.

689756289660 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (689756289661) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 88234072 + ... + 88241888.

It is an arithmetic number, because the mean of its divisors is an integer number (14585190438).

Almost surely, 2^689756289660 is an apocalyptic number.

689756289660 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 689756289660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1050133711536).

689756289660 is an abundant number, since it is smaller than the sum of its proper divisors (1410511133412).

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

689756289660 is a wasteful number, since it uses less digits than its factorization.

689756289660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9644 (or 9639 counting only the distinct ones).

The product of its (nonzero) digits is 470292480, while the sum is 72.

The spelling of 689756289660 in words is "six hundred eighty-nine billion, seven hundred fifty-six million, two hundred eighty-nine thousand, six hundred sixty".