686696549022 has 96 divisors (see below), whose sum is σ = 1636586786016. Its totient is φ = 206366976000.

The previous prime is 686696549009. The next prime is 686696549023. The reversal of 686696549022 is 220945696686.

686696549022 is a `hidden beast` number, since 6 + 8 + 6 + 69 + 6 + 549 + 0 + 22 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (686696549023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 13710858 + ... + 13760850.

It is an arithmetic number, because the mean of its divisors is an integer number (17047779021).

Almost surely, 2^686696549022 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 686696549022, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (818293393008).

686696549022 is an abundant number, since it is smaller than the sum of its proper divisors (949890236994).

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

686696549022 is a wasteful number, since it uses less digits than its factorization.

686696549022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50586 (or 50583 counting only the distinct ones).

The product of its (nonzero) digits is 67184640, while the sum is 63.

The spelling of 686696549022 in words is "six hundred eighty-six billion, six hundred ninety-six million, five hundred forty-nine thousand, twenty-two".