686562228480 has 576 divisors, whose sum is σ = 2387371069440. Its totient is φ = 167508836352.

The previous prime is 686562228427. The next prime is 686562228509. The reversal of 686562228480 is 84822265686.

It is a super-2 number, since 2×686562228480² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 686562228480.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 345526047 + ... + 345528033.

It is an arithmetic number, because the mean of its divisors is an integer number (4144741440).

Almost surely, 2^686562228480 is an apocalyptic number.

686562228480 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 686562228480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1193685534720).

686562228480 is an abundant number, since it is smaller than the sum of its proper divisors (1700808840960).

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

686562228480 is a wasteful number, since it uses less digits than its factorization.

686562228480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2174 (or 2160 counting only the distinct ones).

The product of its (nonzero) digits is 17694720, while the sum is 57.

The spelling of 686562228480 in words is "six hundred eighty-six billion, five hundred sixty-two million, two hundred twenty-eight thousand, four hundred eighty".