1216715516671 has 8 divisors (see below), whose sum is σ = 1248219265104. Its totient is φ = 1185584593920.

The previous prime is 1216715516669. The next prime is 1216715516683. The reversal of 1216715516671 is 1766155176121.

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

It is a cyclic number.

It is not a de Polignac number, because 1216715516671 - 2¹ = 1216715516669 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 (1216715316671) 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, 93199810 + ... + 93212863.

It is an arithmetic number, because the mean of its divisors is an integer number (156027408138).

Almost surely, 2^{1216715516671} is an apocalyptic number.

1216715516671 is a deficient number, since it is larger than the sum of its proper divisors (31503748433).

1216715516671 is a wasteful number, since it uses less digits than its factorization.

1216715516671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186412841.

The product of its digits is 529200, while the sum is 49.

The spelling of 1216715516671 in words is "one trillion, two hundred sixteen billion, seven hundred fifteen million, five hundred sixteen thousand, six hundred seventy-one".