689823937571328 has 1440 divisors, whose sum is σ = 2418170511556800. Its totient is φ = 195746013904896.

The previous prime is 689823937571299. The next prime is 689823937571341. The reversal of 689823937571328 is 823175739328986.

689823937571328 is a `hidden beast` number, since 6 + 8 + 9 + 8 + 2 + 3 + 9 + 3 + 7 + 571 + 32 + 8 = 666.

It is a super-2 number, since 2×689823937571328² (a number of 30 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (81).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 897040230528 + ... + 897040231296.

It is an arithmetic number, because the mean of its divisors is an integer number (1679285077470).

Almost surely, 2^{689823937571328} 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 689823937571328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1209085255778400).

689823937571328 is an abundant number, since it is smaller than the sum of its proper divisors (1728346573985472).

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

689823937571328 is an equidigital number, since it uses as much as digits as its factorization.

689823937571328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1632 (or 1597 counting only the distinct ones).

The product of its digits is 6584094720, while the sum is 81.

The spelling of 689823937571328 in words is "six hundred eighty-nine trillion, eight hundred twenty-three billion, nine hundred thirty-seven million, five hundred seventy-one thousand, three hundred twenty-eight".