1216785728703 has 8 divisors (see below), whose sum is σ = 1627665601408. Its totient is φ = 808548170904.

The previous prime is 1216785728701. The next prime is 1216785728789. The reversal of 1216785728703 is 3078275876121.

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

It is not a de Polignac number, because 1216785728703 - 2¹ = 1216785728701 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1216785728701) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 660577651 + ... + 660579492.

It is an arithmetic number, because the mean of its divisors is an integer number (203458200176).

Almost surely, 2^{1216785728703} is an apocalyptic number.

1216785728703 is a deficient number, since it is larger than the sum of its proper divisors (410879872705).

1216785728703 is a wasteful number, since it uses less digits than its factorization.

1216785728703 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1321157453.

The product of its (nonzero) digits is 7902720, while the sum is 57.

The spelling of 1216785728703 in words is "one trillion, two hundred sixteen billion, seven hundred eighty-five million, seven hundred twenty-eight thousand, seven hundred three".