1216362663 has 10 divisors (see below), whose sum is σ = 1817035704. Its totient is φ = 810908388.

The previous prime is 1216362601. The next prime is 1216362671. The reversal of 1216362663 is 3662636121.

1216362663 is a `hidden beast` number, since 1 + 21 + 6 + 3 + 626 + 6 + 3 = 666.

It is not a de Polignac number, because 1216362663 - 2⁹ = 1216362151 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1216362673) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 7508331 + ... + 7508492.

Almost surely, 2^1216362663 is an apocalyptic number.

1216362663 is a deficient number, since it is larger than the sum of its proper divisors (600673041).

1216362663 is an equidigital number, since it uses as much as digits as its factorization.

1216362663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15016835 (or 15016826 counting only the distinct ones).

The product of its digits is 46656, while the sum is 36.

The square root of 1216362663 is about 34876.3911980583. The cubic root of 1216362663 is about 1067.4667597472.

Adding to 1216362663 its reverse (3662636121), we get a palindrome (4878998784).

The spelling of 1216362663 in words is "one billion, two hundred sixteen million, three hundred sixty-two thousand, six hundred sixty-three".