1216868686747 has 32 divisors (see below), whose sum is σ = 1430871902208. Its totient is φ = 1013135040000.

The previous prime is 1216868686723. The next prime is 1216868686751. The reversal of 1216868686747 is 7476868686121.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1216868686747 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1216868686777) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 133849672 + ... + 133858762.

It is an arithmetic number, because the mean of its divisors is an integer number (44714746944).

Almost surely, 2^{1216868686747} is an apocalyptic number.

1216868686747 is a deficient number, since it is larger than the sum of its proper divisors (214003215461).

1216868686747 is a wasteful number, since it uses less digits than its factorization.

1216868686747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11131.

The product of its digits is 260112384, while the sum is 70.

The spelling of 1216868686747 in words is "one trillion, two hundred sixteen billion, eight hundred sixty-eight million, six hundred eighty-six thousand, seven hundred forty-seven".