216712060729 has 18 divisors (see below), whose sum is σ = 220158800862. Its totient is φ = 213315523200.

The previous prime is 216712060703. The next prime is 216712060769. The reversal of 216712060729 is 927060217612.

It can be written as a sum of positive squares in 3 ways, for example, as 20356726329 + 196355334400 = 142677^2 + 443120^2 .

It is not a de Polignac number, because 216712060729 - 2⁹ = 216712060217 is a prime.

It is a super-2 number, since 2×216712060729² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (216712060769) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 899220049 + ... + 899220289.

Almost surely, 2^216712060729 is an apocalyptic number.

It is an amenable number.

216712060729 is a deficient number, since it is larger than the sum of its proper divisors (3446740133).

216712060729 is an frugal number, since it uses more digits than its factorization.

216712060729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 937 (or 589 counting only the distinct ones).

The product of its (nonzero) digits is 127008, while the sum is 43.

The spelling of 216712060729 in words is "two hundred sixteen billion, seven hundred twelve million, sixty thousand, seven hundred twenty-nine".