1216566650424 has 32 divisors (see below), whose sum is σ = 3092966064000. Its totient is φ = 398648958432.

The previous prime is 1216566650419. The next prime is 1216566650443. The reversal of 1216566650424 is 4240566656121.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 429577204 + ... + 429580035.

It is an arithmetic number, because the mean of its divisors is an integer number (96655189500).

Almost surely, 2^{1216566650424} is an apocalyptic number.

It is an amenable number.

1216566650424 is an abundant number, since it is smaller than the sum of its proper divisors (1876399413576).

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

1216566650424 is a wasteful number, since it uses less digits than its factorization.

1216566650424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 859157307 (or 859157303 counting only the distinct ones).

The product of its (nonzero) digits is 2073600, while the sum is 48.

The spelling of 1216566650424 in words is "one trillion, two hundred sixteen billion, five hundred sixty-six million, six hundred fifty thousand, four hundred twenty-four".