1216678796633 has 4 divisors (see below), whose sum is σ = 1221526122768. Its totient is φ = 1211831470500.

The previous prime is 1216678796611. The next prime is 1216678796647. The reversal of 1216678796633 is 3366978766121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1216678796633 - 2¹⁶ = 1216678731097 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1216678796633.

It is not an unprimeable number, because it can be changed into a prime (1216678796693) 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, 2423662691 + ... + 2423663192.

It is an arithmetic number, because the mean of its divisors is an integer number (305381530692).

Almost surely, 2^{1216678796633} is an apocalyptic number.

It is an amenable number.

1216678796633 is a deficient number, since it is larger than the sum of its proper divisors (4847326135).

1216678796633 is an equidigital number, since it uses as much as digits as its factorization.

1216678796633 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4847326134.

The product of its digits is 82301184, while the sum is 65.

The spelling of 1216678796633 in words is "one trillion, two hundred sixteen billion, six hundred seventy-eight million, seven hundred ninety-six thousand, six hundred thirty-three".