1216934364785 has 8 divisors (see below), whose sum is σ = 1484260930536. Its totient is φ = 957587696640.

The previous prime is 1216934364773. The next prime is 1216934364799. The reversal of 1216934364785 is 5874634396121.

It can be written as a sum of positive squares in 4 ways, for example, as 12474209344 + 1204460155441 = 111688^2 + 1097479^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1216934364785 - 2¹⁴ = 1216934348401 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1994974064 + ... + 1994974673.

It is an arithmetic number, because the mean of its divisors is an integer number (185532616317).

Almost surely, 2^{1216934364785} is an apocalyptic number.

It is an amenable number.

1216934364785 is a deficient number, since it is larger than the sum of its proper divisors (267326565751).

1216934364785 is an equidigital number, since it uses as much as digits as its factorization.

1216934364785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3989948803.

The product of its digits is 26127360, while the sum is 59.

The spelling of 1216934364785 in words is "one trillion, two hundred sixteen billion, nine hundred thirty-four million, three hundred sixty-four thousand, seven hundred eighty-five".