1216323676 has 12 divisors (see below), whose sum is σ = 2129180872. Its totient is φ = 607986288.

The previous prime is 1216323673. The next prime is 1216323679. The reversal of 1216323676 is 6763236121.

It is an interprime number because it is at equal distance from previous prime (1216323673) and next prime (1216323679).

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1216323673) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27630 + ... + 56533.

Almost surely, 2^1216323676 is an apocalyptic number.

It is an amenable number.

1216323676 is a deficient number, since it is larger than the sum of its proper divisors (912857196).

1216323676 is a wasteful number, since it uses less digits than its factorization.

1216323676 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87780 (or 87778 counting only the distinct ones).

The product of its digits is 54432, while the sum is 37.

The square root of 1216323676 is about 34875.8322624708. The cubic root of 1216323676 is about 1067.4553547684.

Adding to 1216323676 its reverse (6763236121), we get a palindrome (7979559797).

The spelling of 1216323676 in words is "one billion, two hundred sixteen million, three hundred twenty-three thousand, six hundred seventy-six".