689528605040 has 320 divisors, whose sum is σ = 1812724728192. Its totient is φ = 241788518400.

The previous prime is 689528605013. The next prime is 689528605049. The reversal of 689528605040 is 40506825986.

It is a Harshad number since it is a multiple of its sum of digits (53).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (689528605049) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 782665400 + ... + 782666280.

Almost surely, 2^689528605040 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 689528605040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (906362364096).

689528605040 is an abundant number, since it is smaller than the sum of its proper divisors (1123196123152).

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

689528605040 is a wasteful number, since it uses less digits than its factorization.

689528605040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1228 (or 1222 counting only the distinct ones).

The product of its (nonzero) digits is 4147200, while the sum is 53.

The spelling of 689528605040 in words is "six hundred eighty-nine billion, five hundred twenty-eight million, six hundred five thousand, forty".