216706163640539 has 16 divisors (see below), whose sum is σ = 220129832418048. Its totient is φ = 213308455175712.

The previous prime is 216706163640503. The next prime is 216706163640559. The reversal of 216706163640539 is 935046361607612.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-216706163640539 is a prime.

It is a super-2 number, since 2×216706163640539² (a number of 29 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (59) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (216706163640559) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 857344994 + ... + 857597720.

It is an arithmetic number, because the mean of its divisors is an integer number (13758114526128).

Almost surely, 2^{216706163640539} is an apocalyptic number.

216706163640539 is a deficient number, since it is larger than the sum of its proper divisors (3423668777509).

216706163640539 is a wasteful number, since it uses less digits than its factorization.

216706163640539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 304034.

The product of its (nonzero) digits is 29393280, while the sum is 59.

The spelling of 216706163640539 in words is "two hundred sixteen trillion, seven hundred six billion, one hundred sixty-three million, six hundred forty thousand, five hundred thirty-nine".