686322352826880 has 2560 divisors, whose sum is σ = 2823337009152000. Its totient is φ = 140987414937600.

The previous prime is 686322352826821. The next prime is 686322352826927. The reversal of 686322352826880 is 88628253223686.

It is a tau number, because it is divible by the number of its divisors (2560).

It is an unprimeable number.

It is a polite number, since it can be written in 255 ways as a sum of consecutive naturals, for example, 1563376657701 + ... + 1563376658139.

It is an arithmetic number, because the mean of its divisors is an integer number (1102866019200).

Almost surely, 2^{686322352826880} is an apocalyptic number.

686322352826880 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 686322352826880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1411668504576000).

686322352826880 is an abundant number, since it is smaller than the sum of its proper divisors (2137014656325120).

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

686322352826880 is a wasteful number, since it uses less digits than its factorization.

686322352826880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 991 (or 961 counting only the distinct ones).

The product of its (nonzero) digits is 637009920, while the sum is 69.

The spelling of 686322352826880 in words is "six hundred eighty-six trillion, three hundred twenty-two billion, three hundred fifty-two million, eight hundred twenty-six thousand, eight hundred eighty".