689859815040 has 896 divisors, whose sum is σ = 2856485373120. Its totient is φ = 157381263360.

The previous prime is 689859815039. The next prime is 689859815041. The reversal of 689859815040 is 40518958986.

It is an interprime number because it is at equal distance from previous prime (689859815039) and next prime (689859815041).

It is not an unprimeable number, because it can be changed into a prime (689859815041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 111 ways as a sum of consecutive naturals, for example, 87242767 + ... + 87250673.

Almost surely, 2^689859815040 is an apocalyptic number.

689859815040 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 689859815040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1428242686560).

689859815040 is an abundant number, since it is smaller than the sum of its proper divisors (2166625558080).

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

689859815040 is a wasteful number, since it uses less digits than its factorization.

689859815040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7972 (or 7945 counting only the distinct ones).

The product of its (nonzero) digits is 24883200, while the sum is 63.

The spelling of 689859815040 in words is "six hundred eighty-nine billion, eight hundred fifty-nine million, eight hundred fifteen thousand, forty".