1216937785463 has 4 divisors (see below), whose sum is σ = 1220850769008. Its totient is φ = 1213024801920.

The previous prime is 1216937785379. The next prime is 1216937785471. The reversal of 1216937785463 is 3645877396121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1216937785463 - 2¹⁴ = 1216937769079 is a prime.

It is a super-2 number, since 2×1216937785463² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1216937785396 and 1216937785405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1216937785163) 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 3 ways as a sum of consecutive naturals, for example, 1956491306 + ... + 1956491927.

It is an arithmetic number, because the mean of its divisors is an integer number (305212692252).

Almost surely, 2^{1216937785463} is an apocalyptic number.

1216937785463 is a deficient number, since it is larger than the sum of its proper divisors (3912983545).

1216937785463 is an equidigital number, since it uses as much as digits as its factorization.

1216937785463 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3912983544.

The product of its digits is 45722880, while the sum is 62.

The spelling of 1216937785463 in words is "one trillion, two hundred sixteen billion, nine hundred thirty-seven million, seven hundred eighty-five thousand, four hundred sixty-three".