689403853824 has 352 divisors, whose sum is σ = 2250433414656. Its totient is φ = 183144284160.

The previous prime is 689403853757. The next prime is 689403853849. The reversal of 689403853824 is 428358304986.

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, 30330784 + ... + 30353504.

Almost surely, 2^689403853824 is an apocalyptic number.

689403853824 is a gapful number since it is divisible by the number (64) 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 689403853824, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1125216707328).

689403853824 is an abundant number, since it is smaller than the sum of its proper divisors (1561029560832).

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

689403853824 is a wasteful number, since it uses less digits than its factorization.

689403853824 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22851 (or 22833 counting only the distinct ones).

The product of its (nonzero) digits is 39813120, while the sum is 60.

The spelling of 689403853824 in words is "six hundred eighty-nine billion, four hundred three million, eight hundred fifty-three thousand, eight hundred twenty-four".