216688206869135 has 8 divisors (see below), whose sum is σ = 260027523337056. Its totient is φ = 173349448765920.

The previous prime is 216688206869111. The next prime is 216688206869137. The reversal of 216688206869135 is 531968602886612.

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

It is not a de Polignac number, because 216688206869135 - 2⁸ = 216688206868879 is a prime.

It is a super-2 number, since 2×216688206869135² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216688206869137) 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, 138736931 + ... + 140290100.

It is an arithmetic number, because the mean of its divisors is an integer number (32503440417132).

Almost surely, 2^{216688206869135} is an apocalyptic number.

216688206869135 is a deficient number, since it is larger than the sum of its proper divisors (43339316467921).

216688206869135 is a wasteful number, since it uses less digits than its factorization.

216688206869135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 279182353.

The product of its (nonzero) digits is 358318080, while the sum is 71.

The spelling of 216688206869135 in words is "two hundred sixteen trillion, six hundred eighty-eight billion, two hundred six million, eight hundred sixty-nine thousand, one hundred thirty-five".