1216466776 has 32 divisors (see below), whose sum is σ = 2620385280. Its totient is φ = 518608800.

The previous prime is 1216466743. The next prime is 1216466777. The reversal of 1216466776 is 6776646121.

1216466776 is nontrivially palindromic in base 3.

It is a super-2 number, since 2×1216466776² = 2959582834223668352, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1216466777) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46170 + ... + 67561.

It is an arithmetic number, because the mean of its divisors is an integer number (81887040).

Almost surely, 2^1216466776 is an apocalyptic number.

It is an amenable number.

1216466776 is an abundant number, since it is smaller than the sum of its proper divisors (1403918504).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1216466776 is a wasteful number, since it uses less digits than its factorization.

1216466776 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113935 (or 113931 counting only the distinct ones).

The product of its digits is 508032, while the sum is 46.

The square root of 1216466776 is about 34877.8837660773. The cubic root of 1216466776 is about 1067.4972150271.

The spelling of 1216466776 in words is "one billion, two hundred sixteen million, four hundred sixty-six thousand, seven hundred seventy-six".