1212328678686 has 48 divisors (see below), whose sum is σ = 2483076873600. Its totient is φ = 394597057680.

The previous prime is 1212328678657. The next prime is 1212328678703. The reversal of 1212328678686 is 6868768232121.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 43596615 + ... + 43624413.

It is an arithmetic number, because the mean of its divisors is an integer number (51730768200).

Almost surely, 2^{1212328678686} is an apocalyptic number.

1212328678686 is an abundant number, since it is smaller than the sum of its proper divisors (1270748194914).

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

1212328678686 is a wasteful number, since it uses less digits than its factorization.

1212328678686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31821 (or 31778 counting only the distinct ones).

The product of its digits is 18579456, while the sum is 60.

The spelling of 1212328678686 in words is "one trillion, two hundred twelve billion, three hundred twenty-eight million, six hundred seventy-eight thousand, six hundred eighty-six".