686006756568 has 48 divisors (see below), whose sum is σ = 2123354248080. Its totient is φ = 196001930304.

The previous prime is 686006756563. The next prime is 686006756569. The reversal of 686006756568 is 865657600686.

686006756568 is a `hidden beast` number, since 6 + 8 + 6 + 0 + 0 + 6 + 7 + 565 + 68 = 666.

686006756568 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×686006756568² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (686006756563) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 680561755 + ... + 680562762.

It is an arithmetic number, because the mean of its divisors is an integer number (44236546835).

Almost surely, 2^686006756568 is an apocalyptic number.

It is an amenable number.

686006756568 is an abundant number, since it is smaller than the sum of its proper divisors (1437347491512).

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

686006756568 is a wasteful number, since it uses less digits than its factorization.

686006756568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1361124536 (or 1361124529 counting only the distinct ones).

The product of its (nonzero) digits is 87091200, while the sum is 63.

The spelling of 686006756568 in words is "six hundred eighty-six billion, six million, seven hundred fifty-six thousand, five hundred sixty-eight".