686467855122 has 48 divisors (see below), whose sum is σ = 1666796917440. Its totient is φ = 184596394752.

The previous prime is 686467855081. The next prime is 686467855133. The reversal of 686467855122 is 221558764686.

686467855122 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×686467855122² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 28265497 + ... + 28289772.

It is an arithmetic number, because the mean of its divisors is an integer number (34724935780).

Almost surely, 2^686467855122 is an apocalyptic number.

686467855122 is an abundant number, since it is smaller than the sum of its proper divisors (980329062318).

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

686467855122 is a wasteful number, since it uses less digits than its factorization.

686467855122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56555315 (or 56555298 counting only the distinct ones).

The product of its digits is 38707200, while the sum is 60.

The spelling of 686467855122 in words is "six hundred eighty-six billion, four hundred sixty-seven million, eight hundred fifty-five thousand, one hundred twenty-two".