216756288419543 has 2 divisors, whose sum is σ = 216756288419544. Its totient is φ = 216756288419542.

The previous prime is 216756288419537. The next prime is 216756288419557. The reversal of 216756288419543 is 345914882657612.

216756288419543 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 216756288419543 - 2¹⁸ = 216756288157399 is a prime.

It is a super-2 number, since 2×216756288419543² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (216756288419443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108378144209771 + 108378144209772.

It is an arithmetic number, because the mean of its divisors is an integer number (108378144209772).

Almost surely, 2^{216756288419543} is an apocalyptic number.

216756288419543 is a deficient number, since it is larger than the sum of its proper divisors (1).

216756288419543 is an equidigital number, since it uses as much as digits as its factorization.

216756288419543 is an evil number, because the sum of its binary digits is even.

The product of its digits is 696729600, while the sum is 71.

The spelling of 216756288419543 in words is "two hundred sixteen trillion, seven hundred fifty-six billion, two hundred eighty-eight million, four hundred nineteen thousand, five hundred forty-three".