1216727108668 has 24 divisors (see below), whose sum is σ = 2139638465664. Its totient is φ = 605402574000.

The previous prime is 1216727108659. The next prime is 1216727108677. The reversal of 1216727108668 is 8668017276121.

It is an interprime number because it is at equal distance from previous prime (1216727108659) and next prime (1216727108677).

It is a hoax number, since the sum of its digits (55) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6787593 + ... + 6964543.

It is an arithmetic number, because the mean of its divisors is an integer number (89151602736).

Almost surely, 2^{1216727108668} is an apocalyptic number.

It is an amenable number.

1216727108668 is a deficient number, since it is larger than the sum of its proper divisors (922911356996).

1216727108668 is a wasteful number, since it uses less digits than its factorization.

1216727108668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185313 (or 185311 counting only the distinct ones).

The product of its (nonzero) digits is 2709504, while the sum is 55.

The spelling of 1216727108668 in words is "one trillion, two hundred sixteen billion, seven hundred twenty-seven million, one hundred eight thousand, six hundred sixty-eight".