689111021012120 has 128 divisors (see below), whose sum is σ = 1779391258012800. Its totient is φ = 235281898070016.

The previous prime is 689111021012077. The next prime is 689111021012147. The reversal of 689111021012120 is 21210120111986.

It is a Harshad number since it is a multiple of its sum of digits (35).

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, 164616032 + ... + 168750288.

It is an arithmetic number, because the mean of its divisors is an integer number (13901494203225).

Almost surely, 2^{689111021012120} 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 689111021012120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (889695629006400).

689111021012120 is an abundant number, since it is smaller than the sum of its proper divisors (1090280237000680).

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

689111021012120 is a wasteful number, since it uses less digits than its factorization.

689111021012120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4136757 (or 4136753 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 35.

The spelling of 689111021012120 in words is "six hundred eighty-nine trillion, one hundred eleven billion, twenty-one million, twelve thousand, one hundred twenty".