1216655206063 has 6 divisors (see below), whose sum is σ = 1337315226632. Its totient is φ = 1106050187220.

The previous prime is 1216655206037. The next prime is 1216655206079. The reversal of 1216655206063 is 3606025566121.

It is not a de Polignac number, because 1216655206063 - 2¹⁷ = 1216655074991 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1216655206163) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5027500731 + ... + 5027500972.

Almost surely, 2^{1216655206063} is an apocalyptic number.

1216655206063 is a deficient number, since it is larger than the sum of its proper divisors (120660020569).

1216655206063 is a wasteful number, since it uses less digits than its factorization.

1216655206063 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10055001725 (or 10055001714 counting only the distinct ones).

The product of its (nonzero) digits is 388800, while the sum is 43.

The spelling of 1216655206063 in words is "one trillion, two hundred sixteen billion, six hundred fifty-five million, two hundred six thousand, sixty-three".