689458709852640 has 4608 divisors, whose sum is σ = 3297890744064000. Its totient is φ = 132888518590464.

The previous prime is 689458709852617. The next prime is 689458709852663. The reversal of 689458709852640 is 46258907854986.

689458709852640 is a `hidden beast` number, since 6 + 8 + 9 + 4 + 5 + 87 + 0 + 9 + 8 + 526 + 4 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (689458709852617) and next prime (689458709852663).

It is a self number, because there is not a number n which added to its sum of digits gives 689458709852640.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 767 ways as a sum of consecutive naturals, for example, 163495067812 + ... + 163495072028.

It is an arithmetic number, because the mean of its divisors is an integer number (715688095500).

Almost surely, 2^{689458709852640} is an apocalyptic number.

689458709852640 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 689458709852640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1648945372032000).

689458709852640 is an abundant number, since it is smaller than the sum of its proper divisors (2608432034211360).

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

689458709852640 is a wasteful number, since it uses less digits than its factorization.

689458709852640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4399 (or 4378 counting only the distinct ones).

The product of its (nonzero) digits is 8360755200, while the sum is 81.

The spelling of 689458709852640 in words is "six hundred eighty-nine trillion, four hundred fifty-eight billion, seven hundred nine million, eight hundred fifty-two thousand, six hundred forty".