1216765676 has 12 divisors (see below), whose sum is σ = 2433531408. Its totient is φ = 521470992.

The previous prime is 1216765639. The next prime is 1216765709. The reversal of 1216765676 is 6765676121.

1216765676 is an admirable number.

It is a super-3 number, since 3×1216765676³ (a number of 28 digits) contains 333 as substring.

It is a hoax number, since the sum of its digits (47) 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 self number, because there is not a number n which added to its sum of digits gives 1216765676.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21727931 + ... + 21727986.

It is an arithmetic number, because the mean of its divisors is an integer number (202794284).

Almost surely, 2^1216765676 is an apocalyptic number.

It is an amenable number.

1216765676 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1216765676 is a wasteful number, since it uses less digits than its factorization.

1216765676 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43455928 (or 43455926 counting only the distinct ones).

The product of its digits is 635040, while the sum is 47.

The square root of 1216765676 is about 34882.1684532370. The cubic root of 1216765676 is about 1067.5846400172.

The spelling of 1216765676 in words is "one billion, two hundred sixteen million, seven hundred sixty-five thousand, six hundred seventy-six".