1216453656827 has 8 divisors (see below), whose sum is σ = 1221622572720. Its totient is φ = 1211285744640.

The previous prime is 1216453656797. The next prime is 1216453656829. The reversal of 1216453656827 is 7286563546121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1216453656827 - 2¹⁰ = 1216453655803 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1216453656829) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2230124 + ... + 2721462.

It is an arithmetic number, because the mean of its divisors is an integer number (152702821590).

Almost surely, 2^{1216453656827} is an apocalyptic number.

1216453656827 is a deficient number, since it is larger than the sum of its proper divisors (5168915893).

1216453656827 is a wasteful number, since it uses less digits than its factorization.

1216453656827 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 501853.

The product of its digits is 14515200, while the sum is 56.

The spelling of 1216453656827 in words is "one trillion, two hundred sixteen billion, four hundred fifty-three million, six hundred fifty-six thousand, eight hundred twenty-seven".